According to Japan’s Specification and Standards for Food Additives (Eighth Edition), caramel color (150d) is one of the substances listed in the “List of Designated Additive” and is allowed to be used in all foods except fresh fish/ shellfish (including whale meat), KONBU (kelp)/WAKAME (seaweed) (both Laminariales ), legumes/pulses, meat, NORI (laver) (except when gold is used on NORI), tea leaves, or vegetables.
Ministry of Health, Labour and Welfare. (2018). Japan’s Specifications and Standards for Food Additives (JSFA), 9th Edition. F. Standards for Use.