Went to the tokyo location and the osaka location, the curries can vary a bit by region and by day. They have very informative lists of allergens if you ask, and even if some curries don't have the GF yellow designation, some are still gluten free. The curries and soups are very tasty and it's a good quick place to get some food when traveling (they tend to be near stations).
— Somewhat
— Gluten-free items are marked on the main menu
— Some
— Good
There is a GF menu including soups and curries!
It is a bit hard to find as it is downstairs on F1 Lumine 2 as it is tucked around the corner from the JR station South East Gate.
— Somewhat
— Separate gluten-free menu
— Most/All
— Excellent