[1] After studying at University of Washington Law School in 1996, in 1998 he became the first head of the Singapore office for the Ministry of International Trade and Industry.

[1] He left the Ministry of Economy, Trade and Industry in 2003, and from that same year he was a Microsoft Asia Executive Officer.

[1] He was elected governor of Ibaraki prefecture in 2017 after defeating six-term incumbent Masaru Hashimoto in a three cornered race.

[2] In July 2019, Ibaraki became the first prefecture to issue partnership certificates for lesbian, gay, bisexual and transgender couples.

[3] Aichi: Hideaki Ōmura Akita: Norihisa Satake Aomori: Sōichirō Miyashita Chiba: Toshihito Kumagai Ehime: Tokihiro Nakamura Fukui: Tatsuji Sugimoto Fukuoka: Seitaro Hattori Fukushima: Masao Uchibori Gifu: Hajime Furuta Gunma: Ichita Yamamoto Hiroshima: Hidehiko Yuzaki Hokkaidō: Naomichi Suzuki Hyōgo: Motohiko Saitō Ibaraki: Kazuhiko Ōigawa Ishikawa: Hiroshi Hase Iwate: Takuya Tasso Kagawa: Toyohito Ikeda Kagoshima: Kōichi Shiota Kanagawa: Yūji Kuroiwa Kōchi: Seiji Hamada Kumamoto: Takashi Kimura Kyoto: Takatoshi Nishiwaki Mie: Katsuyuki Ichimi Miyagi: Yoshihiro Murai Miyazaki: Shunji Kōno Nagano: Shuichi Abe Nagasaki: Kengo Oishi Nara: Makoto Yamashita Niigata: Hideyo Hanazumi Ōita: Kiichiro Satō Okayama: Ryuta Ibaragi Okinawa: Denny Tamaki Osaka: Hirofumi Yoshimura Saga: Yoshinori Yamaguchi Saitama: Motohiro Ōno Shiga: Taizō Mikazuki Shimane: Tatsuya Maruyama Shizuoka: Yasutomo Suzuki Tochigi: Tomikazu Fukuda Tokushima: Masazumi Gotoda Tokyo: Yuriko Koike Tottori: Shinji Hirai Toyama: Hachiro Nitta Wakayama: Shūhei Kishimoto Yamagata: Mieko Yoshimura Yamaguchi: Tsugumasa Muraoka Yamanashi: Kotaro Nagasaki