However, according to this theory, it can be said that Fukai-no-Joten/ Fukaijoten was broken too soon, when Tenchi 's younger brother Emperor Tenmu presented himself to the next heir to the Imperial Throne.
しかしながら、この説に従えば、次の後継者に弟の天武天皇が立ったとき、不改常典は早々に破られたことになる。