(1) Takuya KUWAHARA, “Plasma Clean Technology for Marine Diesel Exhaust Gas”, Doshisha University Energy Conversion Research Center International Fellows’ Technical Seminar, Kyoto (Doshisha University), February 17, 2014.

(2) Takuya KUWAHARA, “Introduction to Time-Frequency Analysis for Functional Fluid Engineering”, Doshisha University Energy Conversion Research Center International Fellows’ Technical Seminar, Kyoto (Doshisha University), February 17, 2015.

(3) Takuya KUWAHARA, “Effect of Exhaust Gas Temperature on Oxidation of Marine Diesel Emission Particulates with Nonthermal-Plasma-Induced Ozone”, The 34th Seminar on Ozone Technology, Japan Ozone Association, Tokyo (Tower Hall Funabori), December 2, 2016. (pp.53-59)

(4) Takuya KUWAHARA, “Technologies Using Functional Fluids For Reduction in Energy Consumption and Environmental Protection”, Doshisha University Energy Conversion Research Center International Fellows’ Technical Seminar, Kyoto (Doshisha University), February 9, 2018.

(5) Takuya KUWAHARA, “Fundamental and Application of Nonthermal Plasma”, Doshisha University Energy Conversion Research Center Technical Seminar 2018 "Lecture on Energy Conversion", Kyoto (Doshisha University), February 19, 2019.

(6) Takuya KUWAHARA and Yusuke ASAKA, “Fundamental Characteristics of Magnetic Fluid Filter Using Nonthermal Plasma”, Research Exchange Seminar on Magnetic Fluids, Ichinen Chemicals, Kanagawa (Ichinen Chemicals R&D Center), September 2, 2022.

(7) Takuya KUWAHARA, “Water Treatment Techniques by Water”, Doshisha University Energy Conversion Research Center Technical Seminar 2022 "Lecture on Energy Conversion", Kyoto (Doshisha University), September 16, 2022.

(8) Takuya KUWAHARA, “Air purification technology using nonthermal plasma discharge from magnetic fluid surface”, Special Guest Lecture at Shenyang University of Technology, Shenyang, China (Shenyang University of Technology), October 25, 2025.

(9) Takuya KUWAHARA, “Development of Sustainable and Durable Bio-Composites Through Elucidation and Optimization of Water Absorption Mechanism”, Special Lecture at M. Kumarasamy College of Engineering, Karur, India (M. Kumarasamy College of Engineering), February 23, 2026.

(10) Takuya KUWAHARA, “Expectations of Japanese Industrial Projects for UG/PG Students in Japanese Universities”, Special Lecture at M. Kumarasamy College of Engineering, Karur, India (M. Kumarasamy College of Engineering), February 24, 2026.