Commission on the Constitution
Commission on the Constitution
(As of November 10,2026)
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 | OKADA Naoki | LDP-GI |
| Director | KITAMURA Tsuneo | LDP-GI |
| Director | KOGA Yuichiro | LDP-GI |
| Director | KOSHO Harutomo | LDP-GI |
| Director | KONISHI Hiroyuki | CDP |
| Director | UEDA Kiyoshi | DPFP-SR |
| Director | TANIAI Masaaki | KP |
| Director | KATAYAMA Daisuke | JIP |
| Director | ADACHI Yuji | SAN |
| INDO Shusaku | LDP-GI | |
| USUI Shoichi | LDP-GI | |
| KADA Hiroyuki | LDP-GI | |
| KAMAYACHI Satoshi | LDP-GI | |
| DEGAWA Momoko | LDP-GI | |
| NISHITA Hidenori | LDP-GI | |
| BABA Seishi | LDP-GI | |
| FUKUYAMA Mamoru | LDP-GI | |
| MAITACHI Shouji | LDP-GI | |
| MATSUKAWA Rui | LDP-GI | |
| MIYAMOTO Kazuhiro | LDP-GI | |
| YAMAMOTO Sachiko | LDP-GI | |
| WAKAI Atsuko | LDP-GI | |
| WAKABAYASHI Yohei | LDP-GI | |
| WAKI Masaaki | LDP-GI | |
| UCHIKOSHI Sakura | CDP | |
| KISHI Makiko | CDP | |
| KIDOGUCHI Eiji | CDP | |
| SUGIO Hideya | CDP | |
| TSUJIMOTO Kiyomi | CDP | |
| ADACHI Yasushi | DPFP-SR | |
| KAWAI Takanori | DPFP-SR | |
| GOTO Hitoshi | DPFP-SR | |
| YAMADA Yoshihiko | DPFP-SR | |
| ITO Takae | KP | |
| SASAKI Masafumi | KP | |
| TSUKASA Takashi | KP | |
| ASADA Hitoshi | JIP | |
| KUSHIDA Seiichi | JIP | |
| MATSUZAWA Shigefumi | JIP | |
| SHIOIRI Sayaka | SAN | |
| MIYADE Chisato | SAN | |
| YAMAZOE Taku | JCP | |
| OKUDA Fumiyo | ||
| HYAKUTA Naoki | CPJ |
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.