Commission on the Constitution
Commission on the Constitution
(As of October 21,2026)
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 | KOGA Yuichiro | LDP-GI |
| Director | KOSHO Harutomo | LDP-GI |
| Director | KAWAI Takanori | DPFP-SR |
| Director | TANIAI Masaaki | KP |
| Director | KATAYAMA Daisuke | JIP |
| Director | ADACHI Yuji | SAN |
| INDO Shusaku | LDP-GI | |
| USUI Shoichi | LDP-GI | |
| OKADA Naoki | LDP-GI | |
| KADA Hiroyuki | LDP-GI | |
| KAMAYACHI Satoshi | LDP-GI | |
| KITAMURA Tsuneo | 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 | |
| KONISHI Hiroyuki | CDP | |
| SUGIO Hideya | CDP | |
| TSUJIMOTO Kiyomi | CDP | |
| ADACHI Yasushi | DPFP-SR | |
| UEDA Kiyoshi | 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.