The Constitution of Japan
日本国憲法
The amendments to this law, and what each one changes, provision by provision: the wording before and after, in Japanese and in English, with the words that change marked.
Promulgated, not yet in force
No amendment to this law is waiting to come into force.
e-Gov records 1 earlier amendment to this law. Their dates and amending laws are listed on the page about this law; what each of them changed is not on this site yet.