InGaAsP/InP optical switches embedded with semi-insulating InP current blocking layers. - Kiyohide Wakao; Kenya Nakai; Masaaki Kino; Shigenobu Yamakoshi (IEEE J. Sel. Areas Commun., 1988)

Progressive differential push-pull method for dual-layer blu-ray disc recording. - Hironori Nakahara; Kenya Nakai; Toshiya Matozaki; Nobuo Takeshita (IEEE Trans. Consumer Electron., 2010)

Track error detection system with dual phase difference for super-resolution optical ROM disc. - Kenya Nakai; Masayuki Ohmaki; Nobuo Takeshita; Masahisa Shinoda; Takayuki Shima (ICCE, 2014)

Track error detection system with waveform comparison method for super-resolution optical read-only-memory disc. - Kenya Nakai; Masayuki Ohmaki; Nobuo Takeshita; Masahisa Shinoda; Takayuki Shima (IEEE Trans. Consumer Electron., 2014)

Examination of suppression of stray light of small PM2.5 sensor. - Shota Nakahara; Satoru Okagaki; Kenya Nakai; Nozomi Enoki; Nobuo Takeshita (ICCE, 2017)