proponent of constitutional reform; constitutional revisionist
Refers to a person who advocates changing the constitution, often used in political contexts.
He is known as a proponent of constitutional reform.
The arguments of constitutional revisionists are dividing public opinion.
護憲論者 is a proponent of protecting the current constitution, the opposite stance of 改憲論者.
Compound of 改憲 (constitutional reform) and 論者 (advocate, theorist).