Overview
- The House of Representatives voted to pass the bill on Friday, July 10, 2026, sending the measure to the House of Councillors for debate before the Diet session ends on July 17.
- The legislation allows the imperial family to adopt males aged 15 or older who descend in the male line from 11 former imperial branches and lets female members retain imperial status after marrying commoners.
- The bill bars adoptees themselves from becoming emperor while allowing their future male descendants to be eligible, and it does not change the male-only, patrilineal rule that currently excludes women and maternal-line heirs.
- Critics question whether distant relatives would accept adoption, argue the change raises legitimacy issues for any returned lines, and point to strong public support for letting women ascend the throne as a major unresolved concern.
- The move followed a period of parliamentary gridlock that eased after concessions by the ruling Liberal Democratic Party and its Japan Innovation Party partner, and the upper house vote will determine whether the law can be enacted this session.