Commission on the Constitution
Commission on the Constitution
(As of October 23,2025)
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 | TSUJIMOTO Kiyomi | CDP |
| Director | KAWAI Takanori | DPFP-SR |
| Director | KATAYAMA Daisuke | JIP |
| Director | ADACHI Yuji | SAN |
| AOYAMA Shigeharu | LDP-GI | |
| INDO Shusaku | LDP-GI | |
| KATAYAMA Satsuki | LDP-GI | |
| KAMAYACHI Satoshi | LDP-GI | |
| KOGA Yuichiro | LDP-GI | |
| KOSHO Harutomo | LDP-GI | |
| KOBAYASHI Kazuhiro | LDP-GI | |
| SUZUKI Muneo | LDP-GI | |
| DEGAWA Momoko | LDP-GI | |
| NAKANISHI Yusuke | LDP-GI | |
| NISHITA Hidenori | LDP-GI | |
| FUKUYAMA Mamoru | LDP-GI | |
| MATSUKAWA Rui | LDP-GI | |
| MIYAMOTO Kazuhiro | LDP-GI | |
| YAMAMOTO Sachiko | LDP-GI | |
| YOSHII Akira | LDP-GI | |
| WAKAI Atsuko | LDP-GI | |
| WAKABAYASHI Yohei | LDP-GI | |
| WAKI Masaaki | LDP-GI | |
| UCHIKOSHI Sakura | CDP | |
| OZAWA Masahito | CDP | |
| KONISHI Hiroyuki | CDP | |
| TAJIMA Maiko | CDP | |
| FUKUSHIMA Mizuho | CDP | |
| YOSHIDA Tadatomo | CDP | |
| ADACHI Yasushi | DPFP-SR | |
| UEDA Kiyoshi | DPFP-SR | |
| HARADA Hidekazu | DPFP-SR | |
| YAMADA Yoshihiko | DPFP-SR | |
| SASAKI Masafumi | KP | |
| TANIAI Masaaki | KP | |
| HARADA Daijiro | 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.