IIUC it's not specifically banned by name in a law, more like not on the whitelist for food additives. Industrialized foodstuffs manufacturing in late 20th cent

IIUC it's not specifically banned by name in a law, more like not on the whitelist for food additives. Industrialized foodstuffs manufacturing in late 20th century Japan was wild, and additives are managed on approvals basis than bans as the result.