Commission on the Constitution
Commission on the Constitution
(As of September 17,2025)
The Commission on the Constitution conducts wide-ranging and integrated research on the Constitution of Japan and basic laws closely related to the Constitution of Japan, and conducts deliberations on bills to amend the Constitution, initiations of amendments related to the Constitution of Japan and bills related to a national referendum.
| Title | Name | Political Groups |
|---|---|---|
| Chairman | NAGAHAMA Hiroyuki | CDP |
| Director | USUI Shoichi | LDP |
| Director | FUJIKAWA Masahito | LDP |
| Director | YAMAMOTO Keisuke | LDP |
| Director | WAKABAYASHI Yohei | LDP |
| Director | KUMAGAI Hiroto | CDP |
| Director | TSUJIMOTO Kiyomi | CDP |
| Director | KAWAI Takanori | DPFP-SR |
| Director | ITO Takae | KP |
| Director | KATAYAMA Daisuke | JIP |
| Director | ADACHI Yuji | SAN |
| AOYAMA Shigeharu | LDP | |
| KAJIHARA Daisuke | LDP | |
| KATAYAMA Satsuki | LDP | |
| KATO Akiyoshi | LDP | |
| KOSHO Harutomo | LDP | |
| KOBAYASHI Kazuhiro | LDP | |
| NAKANISHI Yusuke | LDP | |
| NISHITA Hidenori | LDP | |
| HIGASHINO Hideki | LDP | |
| FUJIKI Shinya | LDP | |
| MATSUKAWA Rui | LDP | |
| MATSUSHITA Shimpei | LDP | |
| YAMAMOTO Sachiko | LDP | |
| YOSHII Akira | LDP | |
| WAKAI Atsuko | LDP | |
| UCHIKOSHI Sakura | CDP | |
| OZAWA Masahito | CDP | |
| KONISHI Hiroyuki | CDP | |
| TAJIMA Maiko | CDP | |
| FUKUSHIMA Mizuho | CDP | |
| ADACHI Yasushi | DPFP-SR | |
| UEDA Kiyoshi | DPFP-SR | |
| MIZUNO Koichi | DPFP-SR | |
| YAMADA Yoshihiko | DPFP-SR | |
| SASAKI Masafumi | KP | |
| TANIAI Masaaki | KP | |
| HIRAKI Daisaku | KP | |
| ASADA Hitoshi | JIP | |
| SHIBATA Takumi | JIP | |
| MATSUZAWA Shigefumi | JIP | |
| SHIOIRI Sayaka | SAN | |
| MIYADE Chisato | SAN | |
| YAMAZOE Taku | JCP | |
| YAMAMOTO Taro |
The names of the political groups in the house, have been abbreviated on this page using unofficial abbreviations. 'None' indicates the house member who is not affiliated with a political group. For the official names of the political groups, please click here.