Commission on the Constitution
Commission on the Constitution
(As of April 14,2026)
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 | IWAMOTO Tsuyohito | LDP-GI |
| Director | KOGA Yuichiro | LDP-GI |
| Director | KOSHO Harutomo | LDP-GI |
| Director | NAKANISHI Yusuke | LDP-GI |
| Director | OZAWA Masahito | CDP |
| Director | YOSHIDA Tadatomo | CDP |
| Director | KAWAI Takanori | DPFP-SR |
| Director | TANIAI Masaaki | KP |
| Director | KATAYAMA Daisuke | JIP |
| Director | ADACHI Yuji | SAN |
| ASAHI Kentaro | LDP-GI | |
| IKUINA Akiko | LDP-GI | |
| ISHIDA Masahiro | LDP-GI | |
| USUI Shoichi | LDP-GI | |
| KAMAYACHI Satoshi | LDP-GI | |
| SHINDO Kanehiko | LDP-GI | |
| DEGAWA Momoko | LDP-GI | |
| NISHITA Hidenori | LDP-GI | |
| MATSUKAWA Rui | LDP-GI | |
| MIYAMOTO Kazuhiro | LDP-GI | |
| YAMADA Taro | LDP-GI | |
| YAMADA Hiroshi | LDP-GI | |
| WAKAI Atsuko | LDP-GI | |
| WAKABAYASHI Yohei | LDP-GI | |
| WAKI Masaaki | LDP-GI | |
| UCHIKOSHI Sakura | CDP | |
| KONISHI Hiroyuki | CDP | |
| TAJIMA Maiko | CDP | |
| TSUJIMOTO Kiyomi | CDP | |
| YAMAUCHI Kanako | CDP | |
| ADACHI Yasushi | DPFP-SR | |
| UEDA Kiyoshi | DPFP-SR | |
| USHIDA Mayu | DPFP-SR | |
| YAMADA Yoshihiko | DPFP-SR | |
| SASAKI Masafumi | KP | |
| HARADA Daijiro | KP | |
| HIRAKI Daisaku | KP | |
| ASADA Hitoshi | JIP | |
| SHIBATA Takumi | JIP | |
| MATSUZAWA Shigefumi | JIP | |
| SAKURAI Shoko | SAN | |
| SHIOIRI Sayaka | SAN | |
| YAMAZOE Taku | JCP | |
| OKUDA Fumiyo |
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.