Journal Papers

1. Kodai Kitagawa, Kyosuke Taguchi, Enke Haoribao, Masaaki Yoshida, "Educational Tool for Simultaneously Teaching Link Mechanism and Power Generation:  A Pilot Study of STEM Education using LEGO", Journal of Innovation, Advancement, and Methodology in STEM Education, Vol.2, No.3, pp.168-175, 2025.

2. Kodai Kitagawa, Arthur Ducoulombier, Mitsumasa Hida, Tadateru Kurosawa, Fuhui Guo, Chikamune Wada, Hiroaki Yamamoto, "LIFTING POSTURE RECOGNITION FOR OCCUPATIONAL HEALTH USING DIGITAL IMAGE AND MACHINE LEARNING",  International Journal of Applied Biomedical Engineering, Vol.18, No.1, pp.1-7, 2025.

3. Ryo Uchimura, Ryohei Fushitani, Kodai Kitagawa, Chikamune Wada, "Musculoskeletal simulation for patient transfer using hand load measurement device", International Journal of Research in Orthopaedics, Vol.11, No.1, pp.1-5, 2025.

4. Kodai Kitagawa and Shoei Nagaoka, "Effects of Assistive Design for Chopsticks on Food Cutting", IETI Transactions on Ergonomics and Safety, Vol.8, No.2, pp.47-53, 2024. 

5. Kodai Kitagawa, Tomoya Murakami,  Chikamune Wada, Hiroaki Yamamoto, "Effect of Soft Knee Brace on Shank Movement in Running", Journal of Prosthetics Orthotics and Science Technology, Vol.3, No.2, pp.42-47, 2024.

6. Edi Ismanto, Abdul Fadlil, Anton Yudhana, Kodai Kitagawa, "A Comparative Study of Improved Ensemble Learning Algorithms for Patient Severity Condition Classification",  Journal of Electronics, Electromedical Engineering, and Medical Informatics, Vol.6, No.3, pp.312-321, 2024. 

7. Kodai Kitagawa and Toshifumi Tanaka, "Analysis on Online Music Reviews for Dream Theater's Album "Images and Words"", International Journal of Music Science, Technology and Art, Vol.6, No.1, pp.43-47. 2024.

8. Hiroaki Yamamoto,  Kodai Kitagawa, Kenta Hiratsuka, "The discrepancy between motivation and learning experience in observation practice", Journal of Physical Therapy Education (Japan), Vol.4, No.2, pp.18-25, 2024. (in Japanese)

9. Kodai Kitagawa, Ryo Takashima, Tadateru Kurosawa, Chikamune Wada, "Foot Position Recognition Using a Smartphone Inertial Sensor in Patient Transfer", BioMed, Vol.4, No.2, pp.112-121, 2024. 

10. Sota Nakano, Hirotaka Okada,  Kouichi Nakamura,  Kodai Kitagawa, Chikamune Wada, "Effects of electrical stimulation of antagonist muscles on shoulder joint adduction force and grip strength", Journal of Physical Therapy Science, Vol.36, No.7, pp.378-381, 2024. 

11. Kodai Kitagawa, Chikamune Wada, Nobuyuki Toya, "Foot Clearance Prediction using Wrist Acceleration and Gait Speed",  Journal of Electronics, Electromedical Engineering, and Medical Informatics, Vol.6, No.1, pp.32-39, 2024. 

12. Kodai Kitagawa, "Wearable Sensors for Posture and Movement in Patient Handling: A Scoping Review", International Journal of Computer, Vol.50, No.1, pp.55-64, 2024. 

13. Mitsumasa Hida, Ryota Imai, Misa Nakamura, Hidetoshi Nakao, Kodai Kitagawa,  Chikamune Wada, Shinji Eto,  Masatoshi Takeda,  Masakazu Imaoka, "Investigation of factors influencing low physical activity levels in community-dwelling older adults with chronic pain: a cross-sectional study", Scientific Reports, Vol.13,  p.14062 (7 pages), 2023. 

14. Mitsumasa Hida, Shinji Eto, Chikamune Wada, Kodai Kitagawa, Masakazu Imaoka, Misa Nakamura, Ryota Imai, Takanari Kubo, Takao Inoue, Keiko Sakai, Junya Orui, Fumie Tazaki, Masatoshi Takeda, Ayuna Hasegawa, Kota Yamasaka, and Hidetoshi Nakao, " Development of Hallux Valgus Classification Using Digital Foot Images with Machine Learning", Life, Vol.13, No.5, pp.1146 (8 pages), 2023. 

15. Hiroaki Yamamoto, Shogo Okamatsu,  Kodai Kitagawa，Chikamune Wada，“Effect of knee orthosis on joint angle during sit-to-stand: Comparison of wearing pressure”, Bulletin of the Japanese Society of Prosthetics and Orthotics, Vol.39, No.3, pp.220-224, 2023. (in Japanese)

16. Kodai Kitagawa, Hayato Nodagashira, Tadateru Kurosawa, Hinako Maeyama, and Chikamune Wada, "Compressive and Shear Forces of L5/S1 during Patient Transfer in Different Loads on Hands", International Journal of Pharma Medicine and Biological Sciences, Vol.12, No.2, pp.21-25, 2023.

17. Kodai Kitagawa, "Investigation on Occupational Injuries in the Japanese Fishing Industry", IETI Transactions on Ergonomics and Safety, Vol.6, No.2, pp.31-38, 2022. 

18. Kodai Kitagawa, "Relationship Between Musculoskeletal Load and Weight of Manual Fish Handling Via 2D Simulation", British Journal of Healthcare and Medical Research, Vol. 9, No. 6, pp.190-193, 2022.

19. Kodai Kitagawa, Koji Matsumoto, Hayato Nodagashira, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, and Chikamune Wada, "Foot Placement and Arm Movement Combination while Turning Patients to Prevent Lower Back Pain", International Journal of Human Movement and Sports Sciences, Vol.10, No.5, pp.1060-1066, 2022.

20. Kodai Kitagawa, "Prediction Method for Large Grasping Force using Single-Channel Surface Electromyography: A Pilot Study", European Journal of Applied Sciences, Vol.10, No.6, pp.320-325, 2022. 

21. Kodai Kitagawa, "Comparison of Machine Learning Algorithms for Ball Velocity Prediction in Baseball Pitcher using a Single Inertial Sensor", Transactions on Machine Learning and Artificial Intelligence, Vol.10, No.6, pp.9-14, 2022. 

22. Hiroaki Yamamoto, Shogo Okamatsu,  Kodai Kitagawa，Chikamune Wada，“Effect of knee orthosis on joint position sense in patients with osteoarthritis of the knee -Analysis focusing on the wearing pressure of the orthosis-”, Rehabilitation Engineering, Vol.37, No.2, pp.91-96, 2022. (in Japanese) 

23. Sho Sasaki, Hiroaki Yamamoto, Kodai Kitagawa, and Chikamune Wada, "Identification of causes of falls during preimpact falls", Journal of Physical Therapy Science, Vol.34, No.4, pp.320-326, 2022. 

24. Hiroaki Yamamoto, Shogo Okamatsu, Kodai Kitagawa, and Chikamune Wada, "Effect of Knee Orthosis Pressure Variation on Muscle Activities during Sit-to-Stand Motion in Patients with Knee Osteoarthritis", International Journal of Environmental Research and Public Health, Vol.19, No.3, p.1341 (10 pages), 2022. 

25. Kodai Kitagawa, Ibai Gorordo Fernandez, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, and Chikamune Wada, "Foot Position Measurement during Assistive Motion for Sit-to-Stand using a Single Inertial Sensor and Shoe-type Force Sensors", International Journal of Environmental Research and Public Health, Vol.18, No.19, p.10481 (18 pages), 2021. 

26. Kodai Kitagawa, Kotaro Yamamoto, Chikamune Wada, "Relationship between Foot Position and Lumbar Loads While Turning Patients on a Bed: An Investigation via Computational Simulation and Electromyography", International Journal of Online and Biomedical Engineering, Vol.17, No.10, pp.131-143, 2021. 

27. Hiroaki Yamamoto，Shogo Okamatsu, Kodai Kitagawa，Chikamune Wada，“Temporal change in wearing pressure of soft knee orthosis during standing up”, Rigakuryoho Kagaku, Vol.36, No.6, pp.859-863, 2021. (in Japanese) 

28. Mitsumasa Hida, Ayuna Hasegawa, Sachiyo Kamitani, Yumi Kamitani, Kodai Kitagawa, Shogo Okamatsu, Seigo Minami, Tadasuke Ohnishi, and Chikamune Wada, "Coronal Spinal Postural Alignment Screening Tool Using Markerless Digital Photography", Advances in Science, Technology and Engineering Systems Journal, Vol.6, No.2, pp.965-970, 2021.  

29. Hiroaki Yamamoto，Kodai Kitagawa，Chikamune Wada，“Awareness of Orthosis in 1st-year Physical Therapy Student: An Analysis using Text-Mining”, Journal of Physical Therapy Fukuoka, Vol.34,  pp.120-123, 2021.  (in Japanese)

30. Kodai Kitagawa, Koji Matsumoto, Kensuke Iwanaga, Siti Anom Ahmad, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, and Chikamune Wada, "Measurement Method for Erector Spinae Muscle Activity during Patient Handling Using Inertial Sensor and Shoe-type Force Sensor", International Journal of Electrical and Electronic Engineering & Telecommunications, Vol.10, No.4, pp.283-287, 2021.

31. Kodai Kitagawa, Yu Taguchi , Chikamune Wada, Nobuyuki Toya, "STEP LENGTH ESTIMATION BASED ON ARM ACCELERATIONS FOR WEARABLE FALL PREVENTION SYSTEMS", International Journal of Applied Biomedical Engineering, Vol.13, No.2, pp.29-35, 2020.

32. Kodai Kitagawa, Yoshiki Nishisako, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu and Chikamune Wada, "Regression Equation between Required Force and Lumbar Load of Caregiver in Supporting Standing-up Motion via Computational Musculoskeletal Simulation", Pertanika Journal of Science and Technology, Vol.28, No,S2, pp.59-70, 2020. 

33. Ibai Gorordo Fernandez, Kodai Kitagawa,  Kawthar Abdul Rahman, Azura Che Soh, Alpha Agape Gopalai, Siti Anom Ahmad, Chikamune Wada, "Linear Regression Technique for Improvement of Feet Position Estimation During Standing Balance Using a Cane with Millimeter Wave Radar", Pertanika Journal of Science and Technology, Vol.28, No,S2, pp.71-81, 2020. 

34. Mitsumasa Hida, Chikamune Wada, Ryota Imai, Kodai Kitagawa, Shogo Okamatsu, Tadasuke Ohnishi, Satoshi Kawashima, "Spinal Postural Alignment Measurements Using Markerless Digital Photography", Journal of Orthopaedic Surgery, Vol.28, No.3, pp.1-7, 2020. 

35. Kodai Kitagawa, Koji Matsumoto, Kensuke Iwanaga, Siti Anom Ahmad, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, and Chikamune Wada, "Posture Recognition Method for Caregivers during Postural Change of a Patient on a Bed using Wearable Sensors", Advances in Science, Technology and Engineering Systems Journal, Vol.5, No.5, pp.1093-1098, 2020.  

36. Kodai Kitagawa, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu and Chikamune Wada, "Text Mining Analysis of Occupational Accidents in Healthcare Service Due to Awkward Movement", Journal of Occupational Safety and Health, Vol.13, No.2, pp.139-143, 2020. (in Japanese)

37. Sota Nakano, Hirotaka Okada, Shigeyoshi Higo,  Kouichi Nakamura,  Kodai Kitagawa and Chikamune Wada, "Usefulness of a simulated experience method for transfer assistance for hemiplegia or limited range of motion in multiple joints", Journal of Physical Therapy Science, Vol.32, No.8, pp.541-544, 2020. 

38. Kodai Kitagawa, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu and Chikamune Wada, "Optimal foot-position of caregiver based on muscle activity of lower back and lower limb while providing standing-up motion support ", Journal of Physical Therapy Science, Vol.32, No.8, pp.534-540, 2020. 

39. Mitsumasa Hida, Chikamune Wada, Shogo Okamatsu, Kodai Kitagawa, Tadasuke Ohnishi, Yasutaka Tada, Takashi Yukawa, Satoshi Kawashima, Seigo Minami, Ryota Hatanaka, "A non-invasive method for thoracic kyphosis measurement using markerless-digital imaging and open-source software", Journal of Osaka Kawasaki Rehabilitation University, Vol.14, pp.37-41, 2020. (in Japanese)

40. Koji Sakamoto, Kodai Kitagawa, Yuji Katae, Naoki Chijiwa, Aki Kuwazono, Hisashi Arizono and Chikamune Wada, "Measurement System for the Clothing Pressure of a Spinal Orthosis using Multiple Pressure Sensors", Journal of Mechanical and Electrical Intelligent System, Vol.3, No.1, pp.1-9, 2020.

41. Kodai Kitagawa, Tsuyoshi Uezono, Takayuki Nagasaki, Sota Nakano, and Chikamune Wada, "Relationship between surface electromyography of the spinae erector muscles and subjectively adjusted step length in the supporting standing-up motion", Journal of Physical Therapy Science, Vol.31, No.11, pp.869-872, 2019.

42. Sota Nakano, Hirotaka Okada, Shigeyoshi Higo, Kouichi Nakamura, Kodai Kitagawa and Chikamune Wada, "Usefulness of simulation method to improve efficiency of chair-to-wheelchair transfer of patients performed by caregivers", Journal of Physical Therapy Science, Vol.31, No.10, pp.802-806, 2019.

43. Kodai Kitagawa, Yoshiki Nishisako, Takayuki Nagasaki, Sota Nakano, and Chikamune Wada, “Musculoskeletal Simulation of the Relationship between Foot Position and Stress of the L4–L5 Joint in Supporting Standing-up Motion to Prevent Low Back Pain Among Caregivers”, Journal of Mechanics in Medicine and Biology, Vol.19, No.2, Paper ID:1940016 (7pages), 2019. 

44. Watcharin Tangsuksant, Masashi Noda, Kodai Kitagawa, and Chikamune Wada,"Viewpoint Classification for the Bus-Waiting Blinds in Congested Traffic Environment", International Journal of Fuzzy Logic and Intelligent Systems, Vol.19, No.1, pp.48-58, 2019.

45. Kodai Kitagawa, Yu Taguchi, and Nobuyuki Toya,"A Study on Classifiers in a Gait Classification Method Using Arm Acceleration Data", International Journal of Biomedical Soft Computing and Human Sciences, Vol.22, No.2, pp.49-56, 2017.

46. Kodai Kitagawa, Yu Taguchi, and Nobuyuki Toya, "Effect of Foot-Ground Clearance during Walking on Acceleration of the Upper Limbs", Rigakuryoho Kagaku, Vol.32, No.4, pp.549-552, 2017. (in Japanese)

47. Kodai Kitagawa, Yu Taguchi, and Nobuyuki Toya, "Proposal of the Gait Classification Application by Arm Acceleration Data and Neural Network for Falls Prevention", Research Reports : Kushiro National College of Technology, Vol.50, pp.79-82, 2017. (in Japanese)

48. Kodai Kitagawa, Kosuke Go, and Nobuyuki Toya,  "Some Discussions of Walking State Estimation Using Miniaturized Sensors for Fall Prevention", Research Reports : Kushiro National College of Technology, Vol.49, pp.27-30, 2016. (in Japanese)

International Conferences

1. Kodai Kitagawa, Chikamune Wada, Nobuyuki Toya, "Comparison of Feature Combinations for Unstable Gait Recognition Using a Single Inertial Sensor and Machine Learning", International Conference on Computational Methods in Engineering and Health Sciences 2025 (ICCMEH2025), p.44,  2025.  (Best Oral Presentation Award)

2. Kodai Kitagawa, Chikamune Wada, Nobuyuki Toya, "Unstable Gait Recognition Using Trunk Inertial Data and Body Measurements of Public Datasets: A Pilot Study", The 6th International Electronic Conference on Applied Sciences, sciforum-138090, 2025. 

3. Kodai Kitagawa, Riki Kosaka,  Chikamune Wada, Hiroaki Yamamoto, "Effects of Support Stays in a Soft Knee Brace on Muscle Activity during Jogging", The 6th International Electronic Conference on Applied Sciences, sciforum-132733, 2025. 

4. Kodai Kitagawa and Sena Imaizumi, "EMG Sensor-Based Evaluation for Joint Position of Assistive Chopsticks in Food-Serving Task", The 12th International Electronic Conference on Sensors and Applications, sciforum-127223, 2025. 

5. Kodai Kitagawa, Yudai Ishikawa, Tadateru Kurosawa, Ryo Uchimura, Shinji Murata, Chikamune Wada, "Fundamental Evaluation of a Single Inertial Sensor in Trunk Angle Measurement During Patient Repositioning", The 12th International Electronic Conference on Sensors and Applications, sciforum-127345, 2025. 

6. Kodai Kitagawa, Rintaro Isaka, Arthur Ducoulombier, "Prototype of Lifting Posture Monitoring System for Preventing Low Back Pain", The 12th International Electronic Conference on Sensors and Applications, sciforum-127661, 2025. 

7. Ryo Uchimura, Ryohei Fushitani, Kodai Kitagawa, Chikamune Wada, "Evaluation of a system for measuring forces acting on the hand in assisting movements", Proc. of 12th International Symposium on Applied Engineering and Sciences (SAES2024), p.0172, 2024.

8. Kodai Kitagawa, Tomoya Murakami,  Chikamune Wada, Hiroaki Yamamoto, "Fundamental Study on Muscle Activity in Running with SoftKnee Brace", The 18th International collaboration Symposium on Information, Production and Systems (ISIPS2024), P1 (2 pages), 2024.

9. Kodai Kitagawa, Mitsumasa Hida,  Chikamune Wada, Hiroaki Yamamoto, "Vertebral Force Prediction during Manual Lifting using Sagittal Plane Posture and Machine Learning", 2024 IEEE 13th Global Conference on Consumer Electronics (GCCE2024),  pp.952-953, 2024. 

10. Kodai Kitagawa and So Ogasawara, "Musculoskeletal Loads in Manual Handling of Fisherman: Comparison between Lifting and Pulling Strategies", SICE Festival 2024 with Annual Conference (SICE2024), WeAT11.21, 2024. 

11. Kodai Kitagawa, Ryo Takashima, Tadateru Kurosawa, Chikamune Wada, "Feature Selection via Decision Tree in Foot Position Recognition during Patient Transfer using Smartphone Inertial Sensor", SICE Festival 2024 with Annual Conference (SICE2024), WeBT11.22, 2024. 

12. Kodai Kitagawa, Hayato Nodagashira, Tadateru Kurosawa, Hinako Maeyama, and Chikamune Wada, "Effects of Foot Placements on Lumbar Loads in Patient Transfer Motion: Comparison Between Anteroposterior and Mediolateral Placements", 2023 IEEE 12th Global Conference on Consumer Electronics (IEEE GCCE 2023), pp.257-258, 2023.(Excellent Poster Award: Outstanding  Prize)

13. Kodai Kitagawa, Chikamune Wada, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, "Comparison of Regression Models for Foot Position Prediction during Patient Lifting Motion using a Single Inertial Sensor", SICE Annual Conference 2023 (SICE2023), FrPOS2.19, 2023. 

14. Kodai Kitagawa and Toshifumi Tanaka, "Text Mining Analysis on Online Music Reviews: A Pilot Study on Dream Theater", SICE Annual Conference 2023 (SICE2023), FrPOS2.18, 2023. 

15. Nobuyuki Toya, Kodai Kitagawa, Chikamune Wada, "Staggering Gait Detection Method using Wrist Acceleration", 2023 45th Annual International Conference of the IEEE Engineering in Medicine & Biology Conference (EMBC2023), No.2549, 2023. 

16. Kodai Kitagawa, Chikamune Wada, Mitsumasa Hida, Hiroaki Yamamoto, "Artificial Neural Network for Prediction of Vertebral Force during Manual Lifting using 2D Digital Image", 10th International Symposium on Applied Engineering and Sciences (SAES2022), C000007, 2022. 

17. Kodai Kitagawa, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, Chikamune Wada, "Combination of Gradient Boosting and Gaussian Process for Foot Placement Prediction using Wearable Sensors", 10th International Symposium on Applied Engineering and Sciences (SAES2022), C000020, 2022. 

18. Kodai Kitagawa, Chikamune Wada, Nobuyuki Toya, "Automatic Gait Classification using Arm Acceleration based on Stature and Gait Speed", 2022 IEEE 4th Global Conference on Life Sciences and Technologies (IEEE LifeTech2022), pp.640-641, 2022. 

19. Hiroki Sugino,  Ibai Gorordo Fernandez, Watcharin Tangsuksant, Kodai Kitagawa, Chikamune Wada, "Transfer Learning-based Camera Viewpoint Identification for Assistive System to Bus-waiting Visually Impaired", 9 th International Symposium on Applied Engineering and Sciences (SAES2021), pp.163-164 (CS14), 2021. 

20. Kodai Kitagawa, Chikamune Wada,  Nobuyuki Toya, "Foot Clearance Prediction Using Wrist Position: A Pilot Study Via Public Dataset", 43rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE EMBC2021), p.5195, 2021.

21. Kodai Kitagawa, Kotaro Yamamoto,  Chikamune Wada, "Suitable Combination of Bed Height and Foot Position for Turning Patient on a Bed", 43rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE EMBC2021), p.5194 2021. 

22. Haoran Wang, Ibai Gorordo Fernandez, Kodai Kitagawa and Chikamune Wada, "Movement Guidance Device in Indoor Environment using Inertial Sensor", 15th International collaboration Symposium on Information, Production and Systems (ISIPS 2021), D2-4, 2021.

23. Tatsuya Onishi, Ibai Gorordo Fernandez, Kodai Kitagawa, Yuji Katae, Naoki Chijiwa, Takahito Oda, Aki Kuwazono, Hisashi Arizono and Chikamune Wada, "Evaluation of Spine Fixation via Spinal Orthosis during Picking-up Motion using Wearable Flex Sensor", 15th International collaboration Symposium on Information, Production and Systems (ISIPS 2021), D2-2, 2021.

24. Go Eto, Ibai Fernandez, Kodai Kitagawa, Siti Anom Ahmad, and Chikamune Wada, "Comparison of Sensor Position for Abnormal Gait Detector using an Inertial Measurement Unit", 15th International collaboration Symposium on Information, Production and Systems (ISIPS 2021), D1-4, 2021.

25. Hiroaki Yamamoto, Shogo Okamatsu, Kodai Kitagawa, Chikamune Wada, "Relationship between Wearing Pressure of Flexible Knee Orthosis and Muscle Activity during Standing-up: A Pilot Study for Knee Osteoarthritis Patient", 18th World Congress of the International Society for Prosthetics and Orthotics (ISPO 2021), 196, 2021. 

26. Kodai Kitagawa, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, Chikamune Wada, "Comparison of Predictors to Estimate Lumbar Muscle Activity Using a Single Inertial Sensor During Patient Handling", 2021 IEEE 10th Global Conference on Consumer Electronics (IEEE GCCE 2021),  pp.445-446, 2021 

27. Kodai Kitagawa, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, Chikamune Wada, "Estimation Technique For Vertical Ground Reaction Force Using Inertial Sensor During Nursing Activity", 17th IEEE-EMBS International Conference on Wearable and Implantable Body Sensor Networks (IEEE BSN'21), ID733830 (1 page), 2021.

28. Tatsuya Onishi, Ibai Gorordo Fernandez, Kodai Kitagawa, Yuji Katae, Naoki Chijiwa, Aki Kuwazono, Hisashi Arizono, Chikamune Wada, "Evaluation Of Wearable Flex Sensor For Spine Angle Measurement During Picking-Up Motion", 17th IEEE-EMBS International Conference on Wearable and Implantable Body Sensor Networks (IEEE BSN'21), ID736693 (1 page), 2021.

29. Kodai Kitagawa, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, and Chikamune Wada,  "Comparison of Machine Learning Algorithms for Patient Handling Recognition based on Body Mechanics", 2021 IEEE 3rd Global Conference on Life Sciences and Technologies (IEEE LifeTech2021), pp.77-79, 2021. (Excellent Paper Award for On-site Poster Presentation: 1st Prize)

30. Kodai Kitagawa, Koji Matsumoto, Kensuke Iwanaga, Siti Anom Ahmad, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, and Chikamune Wada, "Fundamental Study on Prediction Method for Muscle Activity of Caregivers using Inertial Sensor", 8th International Symposium on Applied Engineering and Sciences (SAES2020), E-P3-01, 2020. 

31. Go Eto,  Ibai Gorordo Fernandez,  Kodai Kitagawa, Siti Anom Ahmad, and Chikamune Wada, "A Pilot Study on Abnormal Gait Detector using an Inertial Sensor",  8th International Symposium on Applied Engineering and Sciences (SAES2020), E-P2-01, 2020. 

32. Shogo Okamatsu,  Kazuaki Tsuji,  Kodai Kitagawa, Ibai Gorordo Fernandez, Mitsumasa Hida, and Chikamune Wada, "Relationship between Toe Contact Timing and Motor Function of the Elderly People",  8th International Symposium on Applied Engineering and Sciences (SAES2020), E-P4-11, 2020.

33. Supanat Sakunwitunthai,  Kodai Kitagawa, Ibai Gorordo Fernandez, Siti Anom Ahmad, and Chikamune Wada, "A Pilot Study to Investigate the Effects of Cane Length on Gait Stability",  8th International Symposium on Applied Engineering and Sciences (SAES2020), E-P4-01, 2020. 

34. Kodai Kitagawa, Koji Matsumoto, Siti Anom Ahmad, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, and Chikamune Wada, "Relationship between Lumbar Load and Initial Trunk Posture during Postural Change for a Patient on a Bed", The 4th Global Conference on Biomedical Engineering (GCBME2020), 260050, 2020. 

35. Kensuke Iwanaga, Kodai Kitagawa, Chikamune Wada, "Automatic Identification Method of Patient Handling Motion using a Single Inertial Measurement Unit and Machine Learning", The 4th Global Conference on Biomedical Engineering (GCBME2020), 260100, 2020. 

36. Hiroki Sugino,  Watcharin Tangsuksant, Ibai Gorordo Fernandez, Kodai Kitagawa, Chikamune Wada, "Real-time Camera Viewpoint Identification for Assistive System to Bus-waiting Visually Impaired", The 4th Global Conference on Biomedical Engineering (GCBME2020), 260162, 2020. 

37. Atsushi Tamura, Yoshiki Nishisako, Kodai Kitagawa,Takayuki Nagasaki, Shogo Okamatsu, Chikamune Wada, "The Relationship between Crutch Length and Shoulder Load during Double-Crutch Walking", The 4th Global Conference on Biomedical Engineering (GCBME2020), 260167 , 2020. 

38. Mitsumasa Hida, Chikamune Wada, Kodai Kitagawa, Shogo Okamatsu, Masakazu Imaoka, Hidetoshi Nakao, Ryota Imai,  Tadasuke Ohnishi, Katsumi Hamaoka, "Measurement of thoracic kyphosis using the cranio-horizontal angle in the supine position", The 15th Asian Confederation for Physical Therapy Congress (ACPT2020), S20200622054953T21B10A, 2020. 

39. Kodai Kitagawa, Ibai Gorordo Fernandez, You-Chi Li, Kuang-Ming Lin, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, Fu-Cheng Wang, and Chikamune Wada, “Monitoring System for L4/L5 Compression Force during Assistive Motion using Single Inertial Measurement Unit”, The 14th International Conference on Complex Medical Engineering (CME2020), session 2-8, 2020. 

40. Kodai Kitagawa, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, and Chikamune Wada, "Analysis of Occupational Injury Reports Related to Patient Care Activities using Text Mining Technique", 11th Asia Pacific Conference on Medical and Biological Engineering (APCMBE2020), IFMBE Proceedings, Vol.82, pp.153-158, 2020.

41. Kodai Kitagawa, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, and Chikamune Wada, "Estimation Method for Step Length of Caregiver by Machine Learning Technique Using Combination of Insole Pressure Sensor and Inertial Measurement Unit", 17th International Conference on Biomedical Engineering (ICBME2019), No.1140, 2019.

42. Koji Sakamoto, Kodai Kitagawa, Yuji Katae, Naoki Chijiwa, Aki Kuwazono, Hisashi Arizono, and Chikamune Wada, "Prototype of Measurement System for Clothing Pressures in the Spinal Orthosis", 17th International Conference on Biomedical Engineering (ICBME2019), No.1279, 2019.

43. Ryoya Nakamura, Gen Okuya, Yoshiki Nishisako, Kisuke Iwasaki, Kodai Kitagawa, Naoki Chijiwa, Hisashi Arizono, and Chikamune Wada,"Effects of Counter-Movement Technique during Sport Climbing for Lower Limb Amputees through the Electromyogram Analysis", International Symposium on Ubiquitous Healthcare 2019 (uHealthcare 2019), p.31, 2019.

44. Watcharin Tangsuksant, Masashi Noda, Kodai Kitagawa, Chuchart Pintavirooj, and Chikamune Wada, "Comparison of Regression Algorithm for Vanishing Point Estimation based on Car Distribution",12th Biomedical Engineering International Conference (BMEiCON2019), 1570587628 (5pages), 2019.

45. Kodai Kitagawa, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, and Chikamune Wada, "Decision tree-based model for feet distance estimation during assistive motion", 13th International collaboration Symposium on Information, Production and Systems (ISIPS 2019), P7-3, 2019.

46. Koji Sakamoto, Kodai Kitagawa, Yuji Katae, Naoki Chijiwa, Aki Kuwazono, Hisashi Arizono, and Chikamune Wada, "Clothing pressure measurement of a spinal orthosis during picking-up motion using pressure sensor system", 13th International collaboration Symposium on Information, Production and Systems (ISIPS 2019), P7-2, 2019.

47. Toshiyuki Terukina, Yoshiki Nishisako, Kodai Kitagawa, Tatsuo Morifuji, Naoya Kokusho, Takashi Fujimoto, Yoshio Tsuchiya, Hiroyuki Izumi, Takayuki Tanaka, and Chikamune Wada, "Activity Recognition using Instrumented Cane with Force Sensor and Inertial Measurement Unit for Elderly People", 7th International Symposium on Applied Engineering and Sciences (SAES2019), BM-113, 2019.

48. Koji Sakamoto, Kodai Kitagawa, Yuji Katae, Naoki Chijiwa, Aki Kuwazono, Hisashi Arizono, and Chikamune Wada, "An Influence of a Spinal Orthosis on the Movement of Pelvic and Spinal during Movements for Wiping the Anus", 7th International Symposium on Applied Engineering and Sciences (SAES2019), BM-106, 2019.

49. Kodai Kitagawa, Yoshiki Nishisako, Takayuki Nagasaki, Sota Nakano, Mitsumasa Hida, Shogo Okamatsu, and Chikamune Wada, "Relationship Between the Required Force for Patient Handling and the Lumbar Load of Caregiver in Musculoskeletal Simulation",  7th International Symposium on Applied Engineering and Sciences (SAES2019), BM-16, 2019.

50. Chikamune Wada, Yunchu Huang, Yoshiki Nishisako, Kodai Kitagawa, Naoya Kokusho, Takashi Fujimoto, Yoshio Tsuchiya, Hiroyuki Izumi, Takayuki Tanaka, and Tatsuo Morifuji, "Daily Activity Recognition Method using Sensor-Installed Cane", 7th International Symposium on Applied Engineering and Sciences (SAES2019), BM-08, 2019.

51. Kodai Kitagawa, Takayuki Nagasaki, Sota Nakano and Chikamune Wada, "Comparison of Regression Algorithms for Foot Placement Estimation Method using Foot Pressure Data during Supporting Standing-up Motion", Proceedings of the SICE Annual Conference 2019 (SICE2019), pp.987-989, 2019.

52. Kodai Kitagawa，Tsuyoshi Uezono，Takayuki Nagasaki，Sota Nakano，and Chikamune Wada, "Change of the Ground Reaction Force Obtained from Insole Pressure Sensors during Assistive Motion with Different Lumbar Loads", 13th International Society of Physical and Rehabilitation Medicine World Congress (ISPRM2019), P3-1069, 2019.

53. Kodai Kitagawa, Yoshiki Nishisako, Takayuki Nagasaki, Sota Nakano, and Chikamune Wada, "Prototype of Musculoskeletal Model for Assistance Motion of Standing-up", The 6th International Symposium on Applied Engineering and Sciences 2018 (SAES2018), pp.259-260, 2018.

54. Yejong Lee, Ibai Gorordo Fernandez, Kodai Kitagawa, and Chikamune Wada, "Simulation of ultrasonic sensor placement for foot angle estimation",  International Symposium on Ubiquitous Healthcare 2018 (uHealthcare 2018), p.23, 2018.

55. Kodai Kitagawa, Yoshiki Nishisako, Takayuki Nagasaki, Sota Nakano, and Chikamune Wada, “Relationship between foot position and stresses of the L4–L5 joint in supported standing-up via musculoskeletal simulation”, 21st International Conference on Mechanics in Medicine and Biology (21ICMMB-2018), PSS-204, 2018. (Best Paper Award in Poster Section)

56. Kodai Kitagawa, Tsuyoshi Uezono, Takayuki Nagasaki, Sota Nakano, and Chikamune Wada, “Classification Method of Assistance Motions for Standing-up with Different Foot Anteroposterior Positions using Wearable Sensors”, The International Conference on ICT Robotics 2018 (ICT-ROBOT 2018), FA2.3 (3pages), 2018.

57. Masashi Noda, Hiroyuki Miyamoto, Watcharin Tangsuksant, Kodai Kitagawa, and Chikamune Wada, “ Basic Study on Viewpoints Classification Method using Car Distribution on the Road”, The International Conference on ICT Robotics 2018 (ICT-ROBOT 2018), FA2.4 (3pages), 2018.

58. Kodai Kitagawa, Sai-Wei Yang, Fan-Chih Kuo, and Chikamune Wada, "Automatic classification method using machine learning with a single inertial measurement unit for trunk posture category of OWAS", The 2018 World Congress on Medical Physics and Biomedical Engineering (IUPESM 2018), ID1660, 2018. (Grants for Researchers Attending International Conferences from NEC C&C)

59. Nobuyuki Toya, Yutaro Sakamoto, Yu Taguchi, and Kodai Kitagawa, "Fundamental study of a simple walking support system using smart devices", The 2018 World Congress on Medical Physics and Biomedical Engineering (IUPESM 2018),  IFMBE Proceedings, Vol.68/2, pp.739-743, ID1416, 2018

60. Kodai Kitagawa, Yu Taguchi, and Nobuyuki Toya, "Proposal and Evaluation of the Gait Classification Method Using Arm Acceleration Data and Decision Tree", Proceedings of the 2017 International Conference on Artificial Life and Robotics (ICAROB 2017), pp.104-107, 2017.

Domestic Conferences (in Japanese)

1. 金野壱砂，北川広大, "機械学習とリンクモデルを用いた持ち上げ姿勢の腰部負荷推定システムの試作", 2025年度青森県保健医療福祉研究発表会・日本ヒューマンケア科学学会第 18 回 学術集会合同集会, PS-17, 2025.

2. 坂本晴琉，戸谷伸之，和田親宗，北川広大, "手部の慣性情報を用いた歩行識別の提案：高齢者疑似体験装具による基礎検討", 2025年度青森県保健医療福祉研究発表会・日本ヒューマンケア科学学会第 18 回 学術集会合同集会, PS-18, 2025.

3. 北川広大，和田親宗，“単一慣性センサを用いた車椅子に関する介助動作の識別－公開データセットを用いた基礎検討－”, HCGシンポジウム2025，P-3-19 (2 pages)，2025.

4. 附田理来，石川裕大，黒沢忠輝，和田親宗，北川広大，“単一慣性センサを用いた介助動作の体幹角度計測－機械学習を用いた計測精度向上の試み－”, ，HCGシンポジウム2025，P-3-22 (2 pages)，2025.

5. 前山日向子，伏谷遼平，北川 広大，和田 親宗，“被介助者頭部位置の違いによる介助者腰部負荷への影響”, 第65回北九州医工学術者会議，一般講演１(2 pages)，2025.

6. 肥田光正，今岡真和，中尾英俊，中村美砂，今井亮太，北川広大，和田親宗，“AIによる外反母趾重症度分類システムの構築に関する基礎研究”，日本リハビリテーション医療デジタルトランスフォーメーション学会第3回学術集会，P-11，2025.

7. 戸谷伸之，北川広大，和田親宗，"上肢と下肢の運動の調和と歩容の安定性の関係について”，バイオメディカル・ファジィ・システム学会第37回年次大会，D-1-3, 2024.

8. 内村涼，伏谷遼平，北川 広大，和田 親宗，“介助動作の筋骨格シミュレーションにおける手に作用する力の影響”, 第64回北九州医工学術者会議，講演１(2 pages)，2024.

9. 戸谷伸之，北川広大，和田親宗，"歩行不安定性の評価方法についての検討 ”，第63回日本生体医工学会北海道支部大会, 9, 2024.

10. 北川広大, "医療福祉の支援に向けたヒトの動作姿勢に関する研究"，広域連携医療福祉システム支援機構第11回NPO/GCM交流フォーラム，招待講演, 2024.

11. 中野 聡太，岡田 裕隆，中村浩一，北川 広大，和田 親宗，“機器を用いた傾斜刺激の付与による膝関節伸筋活動の誘発”, 第12回日本支援工学理学療法学会学術大会, 1B55, 2023.

12. 北川広大，和田親宗，永﨑孝之，中野聡太，肥田光正，岡松将吾， "単一慣性センサを用いた起立介助の足部位置計測に関する基礎検討"，日本設計工学会2023年度秋季大会講演論文集，pp.149-150, 2023.

13. 北川広大，和田親宗，戸谷伸之，"手首の加速度を用いた歩行中の足の高さ推定 -高齢者の公開データセットによる基礎検討-", 計測自動制御学会東北支部第343回研究集会，343-1（5 pages)，2023．

14. 肥田光正，中尾英俊，今岡真和，中村美砂，今井亮太，久保峰鳴，長谷川歩菜，北川広大，江藤真士， 和田親宗，"簡易な機械学習ツールを用いた外反母趾評価の試み”，リハビリテーション医療DX研究会第１回学術集会, 1-5-6, 2023．

15. 北川広大，永﨑孝之，中野聡太，肥田光正，岡松将吾，和田親宗, "ウェアラブルセンサと機械学習を用いた介助動作における動作姿勢と腰部負荷の推定"，2022年度青森県保健医療福祉研究発表会・日本ヒューマンケア科学学会　第 15 回 学術集会合同集会，pp.55-56, 2022.（Excellent Poster Award） 

16. 中野 聡太，岡田 裕隆，中村浩一，北川広大，和田親宗，"特殊傾斜台を用いた傾斜刺激の付与による肘関節伸筋活動の誘発”，第11回 日本支援工学理学療法学会学術大会，1A57，2022.

17. 北川広大，和田親宗，戸谷伸之，“シミュレーションによる上肢の加速度情報を用いた足の高さ推定手法の基礎検討”，Japan ATフォーラム2022 講演論文集, pp.11-12, 2022.

18. 戸谷伸之，北川広大，和田親宗，“高齢者のための歩容見守り方式の検討 ～ 慣性センサと無線通信の適用 ～”，電子情報通信学会技術報告, vol. 122, no. 82, MBE2022-11, 2022.

19. 山本裕晃，岡松将吾，北川広大，和田親宗，"異なる装着圧力の膝装具が変形性膝関節症患者の立ち上がり動作に与える影響”，第37回 日本義肢装具学会学術大会，P1-5，2021.

20. 山本裕晃，岡松将吾，北川広大，和田親宗，"膝装具の装着圧力の変化が変形性膝関節症患者の関節位置覚に与える影響"，第35回リハ工学カンファレンス in 北九州，2-2-1 (2 pages)，2021．

21. 山本裕晃，岡松将吾，北川広大，和田親宗，"立ち上がり動作時の軟性膝装具装着圧力の解析"，第58回 日本リハビリテーション医学会学術集会，2-PAK-6-8，2021．

22. 長谷川歩菜，肥田光正，上谷幸代，上谷幸美，岡松将吾，北川広大，和田親宗，“高齢者の脊柱側彎をカメラ画像によりマーカーレスに推定する測定法, 第58回 日本リハビリテーション医学会学術集会，2-PCK-5-4，2021.

23. 大西熙, 中野聡太,  北川広大, 和田親宗，“肘関節の拘縮改善に向けた Tilt Table 使用の検討 －傾斜角度と上腕三頭筋活動との関係－”，日本人間工学会九州・沖縄支部会　第41 回大会，4-2，2020. (Excellent Presentation Award)

24. Chu Xiangyu,  Ibai Gorordo Fernandez,  北川広大, 和田親宗，“慣性センサを用いた起立動作中の体幹角度計測　－センサ装着位置の検討－”，日本人間工学会九州・沖縄支部会　第41 回大会，4-1，2020. 

25. 肥田光正，今岡真和，中村美砂，中尾英俊，今井亮太，田崎史江，南成吾，北川広大，岡松将吾，大西忠輔，和田親宗，“デジタル画像を用いた高齢者の姿勢測定法の一般化に関する一考察”，電子情報通信学会技術報告, Vol.120, No.279, pp.1-4, 2020.

26. 山本裕晃，北川広大，和田親宗，”理学療法学科 1 年次生が装具に対して抱くイメージ”，第 9 回⽇本理学療法教育学会学術⼤会，EP-1-5，2020．

27. 肥田光正，和田親宗，岡松将吾，北川広大，大西忠輔，多田康貴，湯川貴史，川島聡史，南征吾，"デジタル画像計測による円背測定手法の開発"，第3回日本リハビリテーション医学会秋季学術集会，P3-1-2-4，2019．

28. 北川広大，永﨑孝之, 中野聡太, 和田親宗, "足底圧情報による起立介助者の足部位置推定法の提案"，第34回リハ工学カンファレンスinさっぽろ 講演論文集，pp.186-187, 2019.

29. 松本光司，北川広大，和田親宗，"ベッド上での体位変換介助における介助者の足部配置と腰部負荷の関係"，第34回リハ工学カンファレンスinさっぽろ 講演論文集，pp.162-163, 2019.

30. 北川広大，西迫善希，永﨑孝之, 中野聡太, 和田親宗, "腰部に低負荷な起立介助動作の提案に向けた介助者の足部位置に関する検討”，釧路工業高等専門学校 第９回若手理・工学セミナー, 講演10, 2019.

31. 黄贇初, 西迫善希, 北川広大, 森藤達雄, 國生直也, 藤本隆, 土谷圭央, 泉博之, 田中孝之, 和田親宗, "杖型計測装置による日常動作の識別方法の提案", 2019年 日本生体医工学会九州支部学術講演会, 1A4, 2019.

32. 北川広大，永﨑孝之, 中野聡太, 和田親宗, "移乗介助における介助者の腰痛予防に向けた腰部負荷軽減方法の紹介”，釧路工業高等専門学校 第 ８ 回若手理・工学セミナー, 講演9, 2018.

33. 北川広大, 上園剛史, 永﨑孝之, 中野聡太, 和田親宗, "脊柱起立筋の表面筋電位を用いた低負荷な抱え上げ動作の基礎検討", 第36回計測自動制御学会九州支部学術講演会予稿集, p.142, 2017. (Student Presentation Award)

34. 上園剛史, 北川広大, 和田親宗, 永﨑孝之, 中野聡太, "ウェアラブルセンサを用いた移乗介助時の低負荷動作姿勢の識別", 第36回計測自動制御学会九州支部学術講演会予稿集, pp.197-200, 2017.

35. 北川広大, "歩行中における上肢の加速度を用いた下肢状態の識別について", 釧路工業高等専門学校 第 7 回若手理・工学セミナー, O-12-2, 2017.

36. 田口湧, 北川広大, 戸谷伸之, "スマートフォンを使用した歩行解析用アプリケーションの製作", 平成28年度 電気・情報関係学会北海道支部連合大会講演論文集, p.167, 2016.

37. 北川広大, 田口湧, 戸谷伸之, "サポートベクターマシンを用いた上肢の加速度による歩行識別の試み", 電子情報通信学会技術報告, Vol.116, No.248, pp.35-38, 2016．

38. 北川広大, 田口湧, 戸谷伸之, "上肢の加速度による歩行状態判別に向けた統計的分析", 生体医工学シンポジウム2016, 2P-1-2, 2016．

39. 北川広大, 田口湧, 戸谷伸之, "スマートフォンによる歩行状態の識別に向けた特徴量の検討", Japan ATフォーラム2016講演論文集, pp.49-50, 2016．

40. 北川広大, 田口湧, 戸谷伸之, "歩幅を大きくする意識下における手首の加速度についての一検討", 第30回リハ工学カンファレンス論文集, pp.60-61, 2015．

41. 北川広大, 田口湧, 戸谷伸之, "手首の加速度による歩行状態推定方法についての基礎検討", Japan ATフォーラム2015講演論文集, pp.55-56, 2015．

42. 北川広大, 戸谷伸之, "スマートデバイスを用いた高齢者向け転倒防止法の一検討", 第54回日本生体医工学会大会, P2-6-16-G (2 pages), 2015．

43. 北川広大, 郷幸佑, 戸谷伸之, "スマートフォン内蔵センサによる歩行中の足の高さ検出方法の検討", 電子情報通信学会総合大会講演論文集 2015年_基礎・境界, p.268, 2015.

Grants 

• Grant-in-Aid for  Scientific Research (C), 25K16012, 2025-2028.

• Grant-in-Aid for Early-Career Scientists, 23K17262, 2023-2026.

• Grant-in-Aid for Scientific Research (C), 22K12908, 2022-2025.

• Grant-in-Aid for Scientific Research (C), 21K12798, 2021-2024.

• Scholarship of the Nakatani Foundation for Advancement of Measuring Technologies in Biomedical Engineering (Oct. 2019 to Mar.2022)

• Grants for Researchers Attending International Conferences from NEC C&C, 2018.