| 2018 | COMPSAC | Community Energy Management System To Encourage Power Saving Competition. | Takahiro Fujiwara, Toshihiko Tanaka, Kai Takashima, Shigeo Kaneda |
| 2014 | IECON | 13.56-MHz Class-E RF power amplifier using normally-on GaN HEMT. | Masayuki Okamoto, Toshihiko Tanaka, Koyo Matuzaki, Tamotsu Hashizume, Hiroaki Yamada |
| 2013 | IECON | Dual-frequency multiple-output resonant soft-switching inverter for induction heating cooking appliances. | Takayuki Hirokawa, Eiji Hiraki, Toshihiko Tanaka, Makoto Imai, Kenji Yasui, Shinichiro Sumiyoshi |
| 2013 | IECON | A study on GaN inverter based MHz frequency induction heating for tiny metals. | Naoki Yamamoto, Eiji Hiraki, Toshihiko Tanaka, Yukiharu Yamada, Tatsuya Nagao, Yasuhiro Miyake, Yujiro Noda |
| 2012 | IECON | The practical evaluations of time-sharing high-frequency resonant soft-switching inverter for all metal IH cooking appliances. | Takayuki Hirokawa, Eiji Hiraki, Toshihiko Tanaka, Masayuki Okamoto, Mutsuo Nakaoka |
| 2012 | IECON | Performance analysis for high-frequency link AC-AC contact-less power supply system in parking tower. | Shingo Kawano, Eiji Hiraki, Toshihiko Tanaka, Masayuki Okamoto |