1. Shin’ichi Fukuzumi, Hiroshi Nakagawa, Osamu Sakura: User Experience in smart city -UX and safety management for self-driving car, 'Smart Cities at Play Workshop Lived Experiences, Emerging Forms of Playfulness, and Problems of Participation’ CHI’20 workshop, Hawaii , April 25th to 30th, 2020

2. Yusuke Morikawa, Yasuo Tabei, Takehito Utsuro, Hiroshi Nakagawa, et.al. :Classification of Time Series Measurement Data for Shift Control of Automatic Transmission of Vehicles Using Machine Learning Techniques , SAE WCS2020, World Congress Experience, Technical Paper, 20PFL-0188 , #2020-01-0260 , April 21-23, 2020,Detroit, MI

3. Ito, Satoshi., Kikuchi, Hiroaki. & Nakagawa, Hiroshi :Attacker Models with a Variety of Background Knowledge of Payment History, The 15th International Conference on Modeling Decisions for Artificial Intelligence (MDAI-2018), U. of the Balearic Islands 2018

4. Takuma Nakagawa and Hiroshi Nakagawa :Global Suppression Algorithms for Personalized Anonymization of Set-Valued Data. Privacy in Statistical Databases 2018 (PSD 2018) , Valencia, Spain. September 26-28, 2018

5. Takuma Nakagawa, Hiromi Arai, Hiroshi Nakagawa: Personalized Anonymization for Set-Valued Data by Partial Suppression, the 10th International Workshop on Privacy and Anonymity in the Information Society (PAIS 2017) collocated with IEEE ICDM2017, URL:http://cscdb.nku.edu/pais17/program.html, New Orleans, Louisiana (U.S.A.)2017 Nov. 18,

6. Kentaro Minami, Issei Sato, Hiromi Arai, Hiroshi Nakagawa: Differential Privacy without Sensitivity. NIPS2016, December 05 -- December 10, 2016 Centre Convencions Internacional Barcelona, Barcelona SPAIN (accepred 568/2500) proceedings

7. Junpei Komiyama, Junya Honda, Hiroshi Nakagawa: Copeland Dueling Bandit Problem: Regret Lower Bound, Optimal Algorithm, and Computationally Efficient Algorithm. ICML2016, JUNE 19-24 2016 NEW YORK proceedings , preliminary pdf

8. Junpei Komiyama, Junya Honda and Hiroshi Nakagawa: Regret Lower Bound and Optimal Algorithm in Finite Stochastic Partial Monitoring. NIPS 2015. Palais des Congrès de Montréal, Montréal CANADA. Monday December 07 -- Saturday December 12, 2015 NIPS-paper-url

9. Junpei Komiyama, Junya Honda, Hisashi Kashima and Hiroshi Nakagawa: Regret Lower Bound and Optimal Algorithm in Dueling Bandit Problem. COLT2015, pp.1141-1154, Paris France. July 3-6, 2015

10. Junpei Komiyama, Junya Honda, and Hiroshi Nakagawa: Optimal Regret Analysis of Thompson Sampling in Stochastic Multi-armed Bandit Problem with Multiple Plays. ICML2015, pp.1152-1161, Lille, France. July.6-11, 2015

11. Bing Yang, Issei Sato, Hiroshi Nakagawa: Bayesian Differential Privacy on Correlated Data. ACM SIGMOD2015. pp747-762, Melbourne, VIC, Australia on May 31 - June 4, 2015.

12. Seiya Tokui, Issei Sato, Hiroshi Nakagawa: Locally Optimized Hashing for Nearest Neighbor Search. PAKDD 2015, Ho Chi Minh City, Viet Nam, May 19-22 2015.

13. Tengfei Ma, Issei Sato and Hiroshi Nakagawa: The Hybrid Nested/Hierarchical Dirichlet Process and Its Application to Topic Modeling with Word Differentiation. AAAI2015, pp.2835-2841, Austin Texas, USA. Jan.25-30 (presenation date is Jan. 28), 2015

14. Minoru Yoshida, Kazuyuki Matsumoto, Qingmei Xiao, Xielifuguli Keranmu, Kenji Kita and Hiroshi Nakagawa :

15. Extracting Corpus-Specific Strings by Using Suffix Arrays Enhanced with Longest Common Prefix, Proceedings of the 10th Asia Information Retrieval Society Conference (AIRS 2014), LNCS 8870, pp. 360-370, Kuching, Dec. 2014.

16. Junpei Komiyama, Hidekazu Ooiwa, Hiroshi Nakagawa :Robust Distributed Training of Linear Classifiers Based on Divergence Minimization Principle. The European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD 2014) , Springer Lecture Notes Artificial Intelligence (LNAI)8725, pp.1-17, ECML/PKDD, Nancy, France. Sept. 15-19, 2014 (accepted. acceptance ratio 115/483=23.8%)

17. Issei Sato, Hisashi Kashima, and Hiroshi Nakagawa Latent Confusion Analysis by Normalized Gamma Construction. The 31st International Conference on Machine Learning (ICML 2014). pp.1116-1124, June 21-26, 2014 Beijing International Convention Center

18. Issei Sato, and Hiroshi Nakagawa: Approximation Analysis of Stochastic Gradient Langevin Dynamics by using Fokker-Planck Equation and Ito Process. The 31st International Conference on Machine Learning (ICML 2014).pp.982-990, June 21-26, 2014 Beijing International Convention Center

19. Hidekazu Oiwa, Issei Sato, and Hiroshi Nakagawa: Online and Stochastic Learning with a Human Cognitive Bias. AAAI2014. pp.2020-2026, July 27-31, 2014, in Quebec City, Canada

20. Minoru Yoshida, Kazuyuki Matsumoto, Kenji Kita, and Hiroshi Nakagawa: Unsupervised Analysis of Web Page Semantic Structures by Hierarchical Bayesian Modeling. PAKDD 2014, Part II, LNAI 8444, pp. 572–583, May 13-16, 2014. (presentaion on May 16)

21. Hidekazu Oiwa, Issei Sato, and Hiroshi Nakagawa: Novel Sparse Modeling by L2 + L0 Regularization. NIPS2013 DISCML Dec. 9-10, 2013

22. Junpei Komiyama, Issei Sato, and Hiroshi Nakagawa: Multi-armed Bandit Problem with Lock-up Periods.

23. The 5th Asian Conference on Machine Learning: ACML2013 (JMLR: Workshop and Conference Proceedings 29). pp.100-115, Canberra, Australia. Nov.13-15, 2013

24. URL: http://jmlr.org/proceedings/papers/v29/Komiyama13.pdf

25. Tengfei Ma and Hiroshi Nakagawa: Automatically Determining a Proper Length for Multi-document Summarization: A Bayesian Nonparametric Approach. EMNLP2013(ACL SIGDAT Conference of Emprical Methods on Natural Language Processing),pp.736-749 Seattle, USA. Oct.19-21, 2013

26. Yo Ehara, Issei Sato, Hidekazu Oiwa,and Hiroshi Nakagawa: Understanding seed selection. EMNLP2013 Workshop;TextGraphs-8, Seattle, USA. Oct.18, 2013

27. Yo Ehara, Issei Sato, Hidekazu Oiwa,and Hiroshi Nakagawa: Mining words in the minds of second language learners: learner-specific word difficulty. 25th International Conference on Computational Linguistics(COLING 2012), pp.799-814. Mumbai, India. Dec. 8-15, 2012 (long paper)

28. Hidekazu Oiwa, Shin Matsushima, and Hiroshi Nakagawa: Healing Truncation Bias : Self-weighted Truncation framework for Dual Averaging. 12th IEEE International Conference on Data Mining(ICDM), pp.575-584.Brussels. Dec. 10-13, 2012 (long paper, acceptance ratio 10.7%)

29. Issei Sato, Ken-ich Kurihara, Hiroshi Nakagawa. “Practical Collapsed Variational Bayes Inference for Hierarchical Dirichlet Process”. pp.- ,16th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, (KDD 2012),pp.105-113, Beijing, China , Augst 12- August 16 , 2012, (Research Track 133 / 734 = 18.1%).

30. Issei Sato, Hiroshi Nakagawa. “Rethinking Collapsed Variational Bayes Inference for LDA”. 29th International Conference on Machine Learning (ICML 2012) pp. 999-1006, Edinburgh, Scotland, June 26-July 1 , 2012, (long paper acceptance ratio 27.3%). http://icml.cc/2012/papers/530.pdf,

31. Shingo Takamatsu, Issei Sato, Hiroshi Nakagawa. “Reducing Wrong Labels in Distant Supervision for Relation Extraction”. ACL 2012. pp.721-729, Jeju, Korea on July 8-14, 2012 (accepted as oral presentation: 19%)

32. Bing Yang, Issei Sato, Hiroshi Nakagawa: Privacy-Preserving EM Algorithm for Clustering on Social Network. The 16th Pacific-Asia Conference on Knowledge Discovery and Data Mining (PAKDD2012). Kuala Lumpur, Malaysia, May29-June 1, 2012 (accepted as short paper. 88/241=36.5%).

33. Bing Yang, Issei Sato, Hiroshi Nakagawa: Secure Clustering in Private Networks. 11th IEEE International Conference on Data Mining(ICDM), pp.894-903. Vancouver, Canada. Dec. 11-14, 2011 (accepted as long paper, acceptance ratio 18%)

34. Hidekazu Ooiwa, Shin Matsushima, Hiroshi Nakagawa. “ Probabilistic Frequency-aware Truncated methods for Sparse Online Learning”. The European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD 2011) , Springer Lecture Notes Artificial Intelligence (LNAI)6911, ECML PKDD , Part II . pp.533-548, Athens, Greek. Sept. 5-9, 2011 ( acceptance ratio 120/599=20%)

35. Shingo Takamatsu, Issei Sato, Hiroshi Nakagawa. “ Probabilistic Matrix Factorization Leveraging Contexts for Unsupervised Relation Extraction”. PAKDD2011, Springer Lecture Notes Artificial Intelligence (LNAI)6634, Part I. pp.87-99, Shenzhen, China on May 24-27, 2011 (accepted as long paper, acceptance ratio 32/331=9.7%)

36. Issei Sato, Ken-ich Kurihara, Hiroshi Nakagawa. “Deterministic Single-Pass Algorithm for LDA”. Neural Information Processing Systems Conference (NIPS2010). , Vancouver, B.C., Canada, December 6-9, 2010, (accepted, acceptance ratio 293/1219=24.0%)

37. Minoru Yoshida, Shin Matsushima, Shingo Ono, Hiroshi Nakagawa. “ITC-UT:Tweet Categorization by Query Categrization for On-line Reputation management”. CLEF 2010 Labs WePS, p.94. Padua, Italy. 22-23 Sept. 2010

38. Nobuyuki Shimizu, Hiroshi Nakagawa. “Features for Detecting Hedge Cues”. ACL CoNLL2010-ST 2010, Uppsala, Sweden July 15–16, 2010

39. Issei Sato, Hiroshi Nakagawa. “Topic Models with Power-Law Using Pitman-Yor Process”. 16th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining,(KDD2010) pp.673-682 , Washington, DC , USA, July 25-28 , 2010, (long paper acceptance ratio 13%) preliminary pdf

40. Bin Yang, Hiroshi Nakagawa, Issei Sato, Jun Sakuma. “Collusion-Resistant Privacy-Preserving Data Mining”. 16th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining,(KDD2010) pp.483-492 , Washington, DC , USA, July 25-28 , 2010, (long paper acceptance ratio 13%)preliminary pdf

41. Minoru Yoshida, Masaki Ikeda, Shingo Ono, Issei Sato, Hiroshi Nakagawa. “Person Name Disambiguation by Bootstrapping”. The 33rd Annual ACM SIGIR Conference. pp.10-19, Geneva, Swiss. July 19-23, 2010 (acceptance ratio=16.7%) preliminary pdf

42. Minoru Yoshida. Hiroshi Nakagawa. “Mining Numbers in Text Using Suffix Arrays and Clustering Based on Dirichlet Process Mixture Models”. The 14th Pacific-Asia Conference on Knowledge Discovery and Data Mining(PAKDD 2010). pp.230-237. Hyderabad India. June 21-24, 2010 (acceptance ratio=23.3%) preliminary pdf

43. Yang Bin, Hiroshi Nakagawa. “Computation of Ratios of Secure Summations in Multi-Party Privacy-Preserving Latent Dirichlet Allocation”. The 14th Pacific-Asia Conference on Knowledge Discovery and Data Mining(PAKDD 2010). pp.189-197. Hyderabad India. June 21-24, 2010 (acceptance ratio=23.3%) preliminary pdf

44. Yohei Noda, Yoji Kiyota, Hiroshi Nakagawa. “Discovering Serendipitous Information from Wikipedia by Using its Network Structure”. Fourth International AAAI Conference on Weblogs and Social Media (ICWSM 2010) poster presentation. pp.299-302. Washington DC. USA. May 23-26, 2010, poster(pdf)

45. Shin Matsushima, Nobuyuki Shimizu, Kazuhiro Yoshida, Takashi Ninomiya, Hiroshi Nakagawa. “Exact Passive-Aggressive Algorithm for Multiclass Classification Using Support Class”, the 2010 SIAM International Conference on Data Mining (SDM'2010) pp.301-314, (acceptance ratio=23.8%), Columbus, Ohio,U.S.A. April 29 - May 1, 2010. This paper is selected as top 12 papers of SDM2010 pdf(preliminary)

46. Ayako Hoshino, Hiroshi Nakagawa. “Predicting the Difficulty of Multiple-Choice Cloze Questions for Computer-Adaptive Testing”, 11th International Conference on Intelligent Text Processing and Computational Linguistics(CICLING2010), Iasi, Romania, March 21-27, 2010

47. Yo Ehara, Takashi Ninomiya, Nobuyuki Shimizu, Hiroshi Nakagawa. “Personalized Reading Support for Second-language Web documents by Collective Intelligence”, 2010 International Conference on Intelligent User Interfaces Conference (IUI2010), pp.51-60. Hong Kong, China, Feb.7-10, 2010 (Acceptance ratio=22%)

48. Hiroyuki Nakasaki, Yusuke Abe, Takehito Utsuro, Yasuhide Kawada, Tomohiro Fukuhara, Noriko Kando, Masaharu Yoshioka, Hiroshi Nakagawa, Yoji Kiyota. “Cross-Lingual Analysis of Concerns and Reports on Crimes in Blogs”, Mining User-Generated Content for Security (MINUCS2009), Venice Italy, Dec.9, 2009

49. Xiaorong Fan, Nobuyuki Shimizu and Hiroshi Nakagawa .“Automatic Extraction of Bilingual Terms From A Chinese-Japanese Parallel Corpus” 3rd International Universal Communication Symposium (IUCS 2009), Session 1: Machine Translation 4, Dec 3-4, 2009, in Tokyo pdf

50. Takayuki Yoshinaka, Tomohiro Fukuhara, Hidetaka Masuda, Hiroshi Nakagawa. “User-Oriented Splog Filtering Based A User-Oriented Splog Filtering Based on a Machine Learning”. BlogTalk 2009 The 6th International Conference on Social Software, Sept. 15-16,2009, Juje, Korea

51. Issei Sato, Kenichi Kurihara, Shu Tanaka, Seiji Miyashita and Hiroshi Nakagawa .“Quantum Annealing for Variational Bayes Inference” The 25th Conference on Uncertainty in Artificial Intelligence (UAI2009) http://www.cs.mcgill.ca/~uai2009/proceedings.html , in Montreal, Canada, June 18-21 , 2009 pdf

52. Masaki Ikeda, Shingo Ono, Issei Sato, Minoru Yoshida and Hiroshi Nakagawa. “Person Name Disambiguation on the Web by TwoStage Clustering”. 2nd Web People Search Evaluation Workshop (WePS 2009), 18th WWW Conference, Madrid, Spain, April 21. 2009 pdf

53. Yoji Kiyota, Hiroshi Nakagawa, et. al.. “Exploitation of the Wikipedia Category System for Enhancing the Value of LCSH”. Joint Conference of Digital Library:JCDL 2009 , pp.411, 2009(poster) preliminary draft in pdf

54. Nobuyuki Shimizu, Masato Hagiwara, Yasuhiro Ogawa, Katsuhiko Toyama and Hiroshi Nakagawa. "Metric Learning for Synonym Acquisition", The 22nd International Conference on Computational Linguistics : Coling 2008, pp.793-800 , Manchester, UK. Aug 18-22, 2008, (acceptance ratio 27%)pdf

55. Wei Hu, Nobuyuki Shimizu, Hiroshi Nakagawa and Huanye Sheng. "Modeling Chinese Documents with Topical Word-Character Models", The 22nd International Conference on Computational Linguistics : Coling 2008, pp.345-352 , Manchester, UK. Aug 18-22, 2008, pdf(acceptance ratio 27%)pdf

56. Issei Sato, Minoru Yoshida, Hiroshi Nakagawa. "Knowledge Discovery of Semantic Relationships between Words Using Nonparametric Bayesian Graph Model", 14th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining(KDD2008), pp.587-595 , Las Vegas, USA, Aug 24-27, 2008, pdf(acceptance ratio 20%)

57. Ayako Hoshino, Hiroshi Nakagawa. "A Framework for Automatic Generation of Grammar and Vocabulary Questions Presenters", WorldCALL 2008 Programme Committee, oral presentation, Aug. 2008

58. Ayako Hoshino, Hiroshi Nakagawa. "Sakumon and SakumonChallenge: semi-automated and automated question making systems for grammar and vocabulary testing Presenters",WorldCALL 2008 Programme Committee, Courseware Showcase , Aug. 2008

59. Yoshiaki Arai, Tomohiro Fukuhara, Hidetaka Masuda, Hiroshi Nakagawa. "Analyzing Interlanguage Links of Wikipedias", Wikimania 2008 Conference. Alexandria, Egypt July 17-19 2008. preliminary pdf

60. Youji Kiyota, Satoru Tamura, Hidetaka Masuda, Hiroshi Nakagawa. "Automated Subject Induction from Query Keywords through Wikipedia Categories and Subject Headings". 6th LREC(The 6th edition of the Language Resources and Evaluation Conference), Marrakech,Morocco, May 2008. preliminary pdf

61. Tomohiro Fukuhara, Akifumi Kimura, Yoshiaki Arai, Takafumi Yoshinaka, Hidetaka Masuda, Takehito Utsuro, Hiroshi Nakagawa. "KANSHIN: A Cross-lingual Concern Analysis System using Multilingual Blog Articles", The First International Workshop on Next-Generation Search (INGS2008), in conjunction with APWeb 2008, IEEE. pp. 83-90. Shenyang, China, 26 April 2008 pdf

62. Yuki Sato, Takehito Utsuro, Tomohiro Fukuhara, Yasuhide Kawada, Yoshiaki Murakami, Hiroshi Nakagawa, Noriko Kando "Analysing Features of Japanese Splogs and Characteristics of Keywords", WWW2008 workshop: AIRWeb2008. 22 April 2008.

63. Yuki Sato, Takehito Utsuro, Tomohiro Fukuhara, Yasuhide Kawada, Yoshiaki Murakami, Hiroshi Nakagawa, Noriko Kando "Collecting and Analyzing Japanese Splogs based on Characteristics of Keywords", Second International Conference on Weblogs and Social Media (ICWSM 2008) psoter session. April 2008.

64. Shingo Ono, Issei Sato, Minoru Yoshida, Hiroshi Nakagawa. "Person Name Disambiguation in Web Pages using Social Network, Compound Words and Latent Topics", PAKDD2008(The 12th Pacific-Asia Conference on Knowledge Discovery and Data Mining), pp.260-271. May.2008, Osaka, (acceptance ration 12%)

65. Minoru Yoshida, Akira Terada, Hiroshi Nakagawa, "Gram-Free Synonym Extraction via Suffix Arrays". AIRS2008(Asia Information Retrieval Symposium 2008), pp.282-291, Harbin,China, January 2008. (acceptance ratio 27%)pdf

66. Issei Sato, Hiroshi Nakagawa. “Knowledge discovery of multiple-topic document using parametric mixture model with Dirichlet prior”. 13th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining(KDD2007), pp.590-598 , SanJose,California. USA, Aug 12-15, 2007, (acceptance ratio 18%)

67. Ayako Hoshino, Hiroshi Nakagawa. "A Cloze Test Authoring System and its Automation ", ICWL2007-- The 6th International Conference on Web-based Learning , pp.174-181, Edingburgh, Scotland ; August 15-17, 2007)(acceptance ratio 33%)pdf

68. Minoru Yoshida, Hiroshi Nakagawa, "Web Document Parsing: A New Approach to Modeling Layout-Language Relations," ICDAR2007 (The 9th International Conference on Document Analysis and Recognition), pp.203-207, Curitiba, Brazil, September 2007. pdf

69. Tomohiro Fukuhara, Takehito Utsuro, Hiroshi Nakagawa. "Cross-Lingual Concersn Analysisi from Multiingual Weblog Articles", The 6th International Workshop on Social Intelligence Design (SID 2007), pp.55-64, Trent, Italy, July 2-4 2007

70. Nobuyuki Shimizu, Hiroshi Nakagawa, "Structural Correspondence Learning for Dependency Parsing", EMNLP-CoNLL-ST 2007, Prague, Czech Republic, June 2007, pp.1166-1169 pdf

71. Issei Sato, Hiroshi Nakagawa. "Semi-structure Mining Method for Text Mining with a Chunk-based Dependency Structure", PAKDD'07(The 11th Pacific-Asia Conference on Knowledge Discovery and Data Mining), Nanjin, China, May 22-25, 2007(acceptance ratio 17.67%)

72. Tomohiro Fukuhara, Hiroshi Nakagawa, Toyoaki Nishida. " Understanding Sentiment of People from News Articles: Temporal Sentiment Analysis of Social Events", ICWSM-2007 -- Int. Conf. on Weblogs and Social Media, pp.271-272, Boulder, Colorado, USA, Mar 26-28, 2007

73. Ayako Hoshino, Hiroshi Nakagawa. "Assisting cloze test making with a web application", SITE 2007--Society for Information Technology & Teacher Education International Conference, pp.2807-2814, San Antonio, Texas, USA; March 26-30, 2007

74. Ayako Hoshino, Hiroshi Nakagawa. "Sakumon: An assisting system for English cloze test", SITE 2007--Society for Information Technology & Teacher Education International Conference (Demo), pp.2816-2816, Texas, USA; March 26-30, 2007

75. Shingo Ono, Minoru Yoshida, Hiroshi Nakagawa. "NAYOSE: A System for Reference Disambiguation of Proper Nouns Appearing on Web Pages",AIRS2006(Asia Information Retrieval Symposium), Oct.2006, Singapore, ppt

76. Youji Kiyota, Hiroshi Nakagawa, "A Domain Ontology Production Tool Kit Based on Automatically Constructed Case Frames", LREC2006, pp.1482-1487, May 25-27, 2006, Genova, Italy pdf

77. Tsutomu Ohkura, Youji Kiyota, Hiroshi Nakagawa. "Browsing System for Weblog Articles based on Automated Folksonomy", WWW2006 Workshop on the Weblogging Ecosystem, May, 2006, Edinburgh, Scotland, pdf

78. Kumiko Tanaka-Ishii, Hiroshi Nakagawa, "A Multilingual Usage Consultation Tool based on Internet Searching ---More than search engine, Less than QA", The 14th International World Wide Web Conference (WWW2005) pp.363-371. 2005 May, Chiba, Japan pdf (accetpance ratio 12%)pdf

79. Minoru Yoshida and Hiroshi Nakagawa, "Reformatting Web Documents via Header Trees", 43rd ACL2005 Poster/Demo Session, pp.121-124. 2005 July, Ann Arbor pdf

80. Ayako Hoshino and Hiroshi Nakagawa, "A real-time multiple-choice question generation for language testing -- a preliminary study--", 43rd ACL2005 Second Workshop on Building Educational Applications Using Natural Language Processing, pp.17-20. 2005 July, Ann Arbor pdf

81. Takeshi Masuyama, Hiroshi Nakagawa, "Web-based Acquisition of Japanese Katakana Variants", SIGIR2005 (The 28th Annual International ACM SIGIR Conference) . pp.338-344, 2005 Aug. , Salvador, Brazil.pdf ppt(acceptance ratio 17%) ppt

82. Osamu Takizawa1, Kyoko Makino, Tsutomu Matsumoto, Hiroshi Nakagawa and Ichiro Murase, "Method of Hiding Information in Agglutinative Language Documents Using Adjustment to New Line Positions",IEEE KES2005 (Springer LNCS 3683, pp.1039-1048), Sept.14-16, 2005 Melbourne, Australia

83. Ayako Hoshino , Hiroshi Nakagawa, WebExperimenter for Multiple Choice Question Generation", HLT-EMNLP-05(Human Language Technology Conference Conference on Empirical Methods in Natural Language Processing), Proceedings of HLT/EMNLP 2005 Interactive Demonstrations, pp.18-19, October 6-8, 2005 Vancouver, B.C., Canada, pdf

84. Minoru Yoshida, Hiroshi Nakagawa, "Automatic Term Extraction based on Perplexity of Compound Words", Robert Dale, Kam-Fai Wong, Jian Su, and Oi Yee Kwong (Eds.): Natural Language Processing - IJCNLP 2005 Second International Joint Conference, Jeju Island, Korea, October 11-13, 2005. Proceedings, Springer LNAI 3651, pp. 269-279, Oct. 11-13, 2005, Juje, Korea pdf

85. Hiroshi Nakagawa and Hidetaka Masuda: "Extracting Paraphrases of Japanese Action Word of Sentence Ending Part From Web and Mobile News Articles", AIRS2004, Oct.2004 ppt

86. Minoru Yoshida and Hiroshi Nakagawa. "Specification Retrieval -- How to Find Attribute-Value Information on the Web?", Proceedings of IJCNLP (International Joint Conference of Natural Language Processing) 2004, pp.520-527, Hainan-Island, China, March 2004

87. Hidetaka Masuda, Shuuich Tsukamoto and Hiroshi Nakagawa, "Recognition of HTML Table Structure", Proceedings of IJCNLP (International Joint Conference of Natural Language Processing) 2004, pp.183-188, Hainan-Island, China, March 2004,pdf

88. Hiroshi Nakagawa, Hideaka Masuda and Dai Sato, "Terminal Device Oriented Comparable Corpora and its Alignment -- Towards Extracting Paraphrasing Patterns -- ", Proceedings of LREC2004(4th INTERNATIONAL CONFERENCE ON LANGUAGE RESOURCES AND EVALUATION), pp.1167-1170, Lisbon, Portugal, May 2004pdf

89. Hiroshi Nakagawa, Hiroyuki Kojima, Akira Maeda, "Chinese Term Extraction from Web Pages Based on Compound word Productivity", 42nd Annual Meeting of the Association for Computational Linguistics (ACL2004), Third SIGHAN Workshop on Chinese Language Processing, pp.79-85, Barcelona, Spain, July, 2004 pdf

90. Koichi Yamada, Hisashi Komine, Hiroshi Kinukawa, Hiroshi Nakagawa, "Abstract of Abstract: A New Summarizing Method based on Document Frequency and Clause Length", SCI2004(The 8th World Multi-Conference on Systemics, Cybernetics and Informatics), Volume XIV, pp.56-61, Orland,U.S.A., July. 2004

91. Takeshi Masuyama, Satoshi Sekine, Hiroshi Nakagawa, "Automatic Construction of Japanese KATAKANA Variant List from Large Corpus", COLING2004(Proceedings of the 20th International Conference on Computational Linguistics), pp. 1214-1219, Geneva, Switzerland, August 2004 pdf

92. Hiroshi Nakagawa, Hideaka Masuda, "Extracting Paraphrases of Japanese Sentence Ending Part From Web and Mobile News Articles", Proceedings of AIRS2004(Asia Information Retrieval Symposium), pp.56 -62, Beijin, China pdf

93. Kenichiro Akai, Masayasu Murano, Ichiro Murase, Kyoko Makino, Osamu Takizawa, Tsutomu Matsumoto, Masataka Suzuki, Katsunari Yoshioka and Hiroshi Nakagawa, "IMPLEMENTING XML INFORMATION HIDING BY XSLT", Proceedings of STEG'04:Pacific Rim Workshop on Digital Steganography, 2004, pp.96 -100, Fukuoka

94. Takashi Masuyama, Hiroshi Nakagawa. "Cascaded Feature Selection in SVM Text Categorization", Lecture Note in Computer Science: the proceedings of 4th International Coference on Intelligent Text Processing and Computational Linguistics CICLing-2003, pp.588-591, Mexico City, Feb. 2003

95. Kumiko Tanaka-Ishii, Masato Yamamoto, Hiroshi Nakagawa. "Kiwi: A Multilingual Usage Consultation Tool based on Internet Searching", Proceedings of the Interactive Posters/Demonstrations, ACL-03, pp.105-108, Sapporo, July 2003

96. Kumiko Tanaka-Ishii, Michiko Abe, Hiroshi Nakagawa. "Categorization of movies using comments", Proceedings of PACLING'03 (Pacific Association for Computational LINGuistics), pp.221-229, Halifax, Nova Scotia, Canada, Aug. 2003

97. Hiroshi Nakagawa, Tataunori Mori. "A Simple but Powerful Automatic Term Extraction Method", Computerm2: 2nd International Workshop on Computational Terminology, COLING-2002 WORKSHOP, pp. 29-35,Taipei, August 31, 2002

98. Takashi Masuyama, Hiroshi Nakagawa. "Applying Cascaded Feature Selection to SVM Text Categorization", 3rd International Workshop on Natural Language and Information Systems, pp. 241-245, Aix-en-Provence, France, September 2-3, 2002

99. Hiroshi Nakagawa. "Disambiguation of Compound Noun Translations Extracted from Bilingual Comparable Corpora", 6th Natural Language Processing Pacific Rim Symposium (NLPRS'01), 67-74,Tokyo, 2001

100. Toshihiko Watanabe, Yusuke Inutsuka, Kumiko Tanaka-Ishii and Hiroshi Nakagawa. "Text Entry/Conversion Systeem for Mobile Phones", 6th Natural Language Processing Pacific Rim Symposium (NLPRS'01), 781-782,Tokyo, 2001

101. Hidetaka Masuda, Daisuke Yasutomi, Hiroshi Nakagawa. "How to Transform Tables in HTML for Displaying on Mobile Terminals", 6th NLPRS Workshop of Automatic Paraphrasing: Theories and Applications, Tokyo, 2001

102. Singo Inoue, Kyoko Makino, Ichiro Murase, Osamu Takizawa, Tsutomu Matsumoto and Hiroshi Nakagawa. "Proposal on Information Hiding Method using XML", 6th NLPRS Workshop of NL/XML, Tokyo, 2001

103. Hiroshi Nakagawa, ``Disambiguation of Lexical Translations Based on Bilingual Comparable Corpora'', 2nd International Conference on Language Resources and Evaluation:LREC2000 Workshop of Terminology Resorces and Computation: WTRC2000, pp.33-38, Athens, May 2000

104. Seigo Tanimura, Hiroshi Nakagawa, ``Alignment of Sound Track with Text in a TV Drama'',Proceedings of the Workshop Semantic Annotation and Intelligent Content, Luxembroug, pp. 63 - 69, Aug 2000

105. Koich Yamada, Kazunari Sugiyama, Yasunori Yonemine, Hiroshi Nakagawa, "Identification of Coreference Between Names and Faces", ACL Workshop on 'Coreference and Its Applications' 1999.6

106. Tatsunori Mori, Shun'ichi Tanaka, Hiroshi Nakagawa, "Similarity Calculation of Segment Retrieval for Aid in reading Related Documents", Proceedings of Natural Language Processing Pacific Rim Symposium '99 (NLPRS'99), pp 178 - 183, Nov.1999

107. Tatsunori Mori, Hiroshi Nakagawa, Nobuyuki Omori, Jun Okamura, "Hypertext Authoring for Linking Relevant Segments of Related Instruction Manuals", Proceedings of the 17th International Conference on Computational Linguistics /36th Annual Meeting of the Association for Computatinal Linguistics (COLING-ACL 98), pp. 929 - 933, 1998.8, Montreal, Canada

108. Hiroshi Nakagawa, Tatsunori Mori, "Nested Collocation and Compound Noun For Term Extraction", Proceedings of the First Workshop on Comutational Terminology (COMPUTERM'98), pp. 64 - 70, 1998.8, Montreal, Canada

109. Koichi Saito, Yoshihiro Iwai, Naoyoshi Tamura, Hiroshi Nakagawa, "Numerical Information Extraction from Newspaper's Articles", The 3rd International Workshop on Information Retrieval with Asian Languages (IRAL'98), 1998.10 Singapore, pp. 39 - 45

110. Hiroshi Nakagawa, "Extraction of Index Words from Manuals", 4th RIAO'97 Conference Computer-Assisted Searching on the Internet, pp. 598 - 611, 1997.6, McGill University, Montreal, Canada

111. Tatsunori Mori, Mamoru Matsuo, and Hiroshi Nakagawa, "Constraints and Defaults on Zero Pronouns in Japanese Instruction Manuals", Proceedings of ACL(Annual Meeting of the Association for Computational Linguistics) Workshop "Operational factors in practical, robust anaphora resolution for unrestricted texts" 1997.7, Madrid, Spain, pp.7-13

112. Hiroshi Nakagawa, Yoshitomo Yaginuma, Masao Sakauchi, "Scene Direction Based Reference In Drama Scenes", Proceedings of ACL(Annual Meeting of the Association for Computational Linguistics) Workshop "Referring Phenomena in a Multimedia Context and their Computational Treatment" 1997.7, Madrid, Spain, pp.52-58

113. Ko-ichi Yamada, Tatsunori Mori and Hiroshi Nakagawa, "Japanese Compound Nouns Matching For Information Retrieval", The 2nd International Workshop on Information Retrieval with Asian Languages -1997, 1997.10 Tsukuba-City, Japan, pp.158 - 164

114. Mamoru Matsuo, Tatsunori Mori and Hiroshi Nakagawa, "Resolution of Zero Pronouns in Japanese instruction Manuals and its Application", The 4th Natural Language Processing Pacific Rim Symposium'97 (NLPRS'97), pp. 81 - 86, 1997.12, Puket, Thailand

115. Hiroshi Nakagawa, "Index-Words Extraction Based On Word Generative Power", Workshop on Information Retrieval with Oriental Languages, pp. 9-16, 1996.6, Taejon, Korea

116. Tatsunori Mori, Hiroshi Nakagawa, "Zero Pronouns and Conditionals in Japanese Instruction Manuals", Proceedings of the 16th International Conference on Computational Linguistics (COLING 96), pp.782 - 787, 1996.8, Copenhagen, Denmark

117. Shin-ichiro Nishizawa, Hiroshi Nakagawa, "Coreference Analysis for Japanese Complex Sentences", The 3rd Natural Language Processing Pacific Rim Symposium'95 (NLPRS'95), pp.284 - 289, 1995.12, Seoul, Korea

118. Tatsunori Mori, Hiroshi Nakagawa, "A pragmatic approach to zero pronoun resolution in Japanese manual sentences", The 3rd Natural Language Processing Pacific Rim Symposium'95 (NLPRS'95), pp.296 - 301, 1995.12, Seoul, Korea

119. Hiroshi Nakagawa, Shin-ichiro Nishizawa, "Semantics of Complex Sentences in Japanese", The 15th International Conference on Computational Linguistics (COLING'94) pp.679-685, 1994.8, Kyoto, Japan

120. Tatsunori Mori, Hiroshi Nakagawa, "Constraint of the Japanese Conjunction "shikashi (but)"", First Pacific Association for Computer Linguistics Conference (PACLING'93), , pp 43 - 52, 1993.4, Vancouver, Canada

121. Nobuaki Muto, Hiroshi Nakagawa, "Semantics of Japanese Particles for NP Coordination", 4th Conference of Natural Language Understanding and Logic Programming (NLULP4), pp 172 - 185 ,1993.10, Nara, Japan

122. Hiroshi Nakagawa, "Evidential Modality in Spoken Dialogues", International Symposium on Spoken Dialogue (ISSD-93), pp 215 - 218, 1993.11, Waseda University, Tokyo

123. Susumu Ono, Hiroshi Nakagawa, Semantics of Japanese Sentence Final Particles --- about `Yo' `Ne' and `Na' ---", Natural Language Processing Pacific Rim Symposium '93 (NLPRS '93), pp248 - 255, 1993.12, Fukuoka, Japan

124. Nobuaki Muto, Hiroshi Nakagawa : "Japanese Case Marker Distribution", International Symposium on Natural language Understanding and AI '92, 1992.7, Iizuka, Japan

125. Hiroshi Nakagawa : "Zero Pronouns as Experiencer in Japanese Discourse", Proceedings of COLING'92, pp. 324 -- 330, 1992.7, Nantes, France

126. Hiroshi Nakagawa, Nobuaki Muto, Tatsunori Mori : "Activity Propagation as Discourse Understanding", 2nd Pacific Rim International Conference on Artificial Intelligence, pp. 233 -- 238, 1992.9, Seoul, Korea

127. Tatsunori Mori, Hiroshi Nakagawa : "A Formalization of Metaphor Understanding in situation Semantics", International Joint Conference of Artificial Intelligence (IJCAI) -91 Workshop W.20 Computational Approaches to Non-literal Language etc. 1991.8, Sydney Australia

128. Hiroshi Nakagawa : "Highlighted Meanings of RNP and Anaphora in Elliptical VPs in Japanese", Natural Language Processing Pacific Rim Symposium, 1991.11, Singapore

129. Hiroshi NAKAGAWA , Tatsunori MORI : "A Parser based on Connectionist Model", Proceeding of COLING'88 , pp.454-457, 1988.8, Budapest, Hungary

130. Hiroshi Nakagawa : "The Prolog Program Transformation System", IFIP TC 2 Working Conference on Program Specification and Transformation at Bad Toelz ,FRG, North-Holland, 1986.4, Bad Toelz, Germany

131. Hiroshi Nakagawa : "AND Parallel PROLOG with Divided Assertion Set", IEEE 1984 International Symposium on Logic Programming, pp.22-28, Feburuary, 1984, Atlantic City, USA

132. Hiroshi Inose, Tadao Saito, Hiroshi Nakagawa : "On-line Remote Access System for a Pattern Data Base Featuring Microfihe Storage and Facsimile Recording", National Telecommunications Conference '80, pp.16.3.1-4, November, 1980, USA

Student's publication

1. Shin Matsushima, S. V. N. Vishwanathan, Alexander J. Smola. “Linear Support Vector Machines via Dual Cached Loops”. pp.177-185 ,16th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, (KDD 2012),pp., Beijing, China , Augst 12- August 16 , 2012, (Research Track 133 / 734 = 18.1%)