I have read of another method of execution in japan that involved a karate chop to the neck or a judo hold that resulted in a broken neck or something like that. It’s probably not practised any more.
Hm mm.As far as I know, Japan has never used such method.
Executions in Japan has been hanging since Meiji Restoration(1868).
In medieval, most executions are carried by beheading .Samurais were allowed to commit ritualized suicide now known as seppuku(aka:Harakiri) instead of beheading.
I also heard crucifixion,death by burning and death by boiling were occasionally used.