Frequently Asked Questions
Is Japanese soy sauce gluten-free?
No. Standard Japanese soy sauce (Shoyu) is made with wheat and soy. Travelers must look for 'Tamari' (usually GF, but check labels) or specifically labeled 'Gluten-Free Soy Sauce'.
How do I communicate my allergy?
We recommend carrying a 'Gluten Free Restaurant Card' in Japanese. A useful phrase is: 'Watashi wa komugi arerugii ga arimasu' (I have a wheat allergy) or 'Komugi o taberaremasen' (I cannot eat wheat).
Is sushi safe?
Sushi rice is mixed with vinegar, sugar, and salt, which is usually safe. However, the soy sauce provided, imitation crab (surimi), and eel sauce (unagi tare) often contain wheat. Always bring your own GF soy sauce packets if unsure.
Are soba noodles gluten-free?
Not always. While 'soba' means buckwheat, most cheap soba noodles in Japan are a mix of buckwheat and wheat flour (ni-hachi soba). Only 'Juwari Soba' (100% buckwheat) is gluten-free, but even then, cross-contamination is a risk.
Is miso soup gluten-free in Japan?
It depends. The miso paste itself is usually made from soybeans and rice (kome-miso) or barley, and rice miso is gluten-free. However, most miso soup in restaurants is made with dashi stock that contains soy sauce. Always ask whether the dashi uses soy sauce or specify you need tamari-based dashi.
Are Japanese rice crackers (senbei) gluten-free?
Traditional senbei are made from rice, but most commercially available senbei are coated or seasoned with soy sauce that contains wheat. Always check labels for 'komugi' (wheat). Some specialty brands produce certified gluten-free senbei — look for these in natural food stores.
Can celiacs safely eat at conveyor belt sushi (kaiten-zushi)?
Cross-contamination risk is high at kaiten-zushi restaurants. Soy sauce is used throughout, shared utensils are common, and items travel past non-GF food. We recommend visiting dedicated gluten-free sushi restaurants instead, or asking a standard sushi restaurant to accommodate you directly with tamari.
Is konjac (konnyaku) gluten-free?
Yes. Konjac (konnyaku) is made from the konjac plant and contains zero gluten. It is completely safe for celiacs. Konjac products like shirataki noodles are a great gluten-free alternative to wheat noodles in hot pots and stews.
What Japanese foods are naturally gluten-free?
Many traditional Japanese foods are naturally gluten-free: plain steamed rice, sashimi (without soy sauce), plain tofu, most fresh vegetables and fruit, natto (fermented soybeans), most Japanese pickles (tsukemono), plain grilled fish and meat (without sauce), and eggs. The key is to avoid wheat-based sauces and marinades.
Is CoCo Ichibanya (CoCo Curry) gluten-free?
Standard CoCo Ichibanya curry roux contains wheat flour and is NOT safe for celiacs. However, some locations now offer a specific gluten-free curry option — ask for the 'GF curry' menu. Always confirm with staff before ordering, as availability varies by branch. The Shinjuku West Exit branch is one location that has offered GF options. For guaranteed celiac-safe curry, check our curated list of dedicated GF restaurants.
Can I eat gluten-free ramen in Japan?
Standard ramen noodles are made from wheat flour, so regular ramen is NOT safe. However, several restaurants in Tokyo now offer certified gluten-free ramen with rice-based noodles. Afuri (multiple locations) is famous for their GF yuzu shio ramen. Our site lists verified GF ramen spots — check our Best Gluten-Free Ramen guide for the top-rated options.
Are Japanese noodles gluten-free?
Most Japanese noodles contain wheat: ramen, udon, and somen are all wheat-based. Soba noodles are made from buckwheat but usually mixed with wheat flour (only 100% buckwheat 'juwari soba' is GF). Safe alternatives include: rice noodles (beefun), shirataki/konjac noodles, and GF ramen at specialized restaurants. Always ask 'komugi wa haitte imasu ka?' (does this contain wheat?).
Is Japanese tempura gluten-free?
No. Traditional tempura batter is made with wheat flour. Some dedicated GF restaurants offer tempura made with rice flour batter, but this is rare. Kushiage Su in Ginza is one restaurant that offers GF fried foods. Always confirm the batter is wheat-free before ordering.
What convenience store foods are safe for celiacs in Japan?
Several items at 7-Eleven, FamilyMart, and Lawson are usually safe: onigiri (rice balls — check fillings), hard-boiled eggs, fresh fruit, plain yogurt, nuts, and some rice-based snacks. Avoid anything with soy sauce seasoning, bread, or fried items. Check the allergen label for '小麦' (komugi/wheat). See our detailed Convenience Store Guide for specific product recommendations.
Is takoyaki gluten-free?
No. Traditional takoyaki (octopus balls) batter is made with wheat flour and is NOT safe for celiacs. The batter also typically contains dashi, which may include soy sauce. Takoyaki sauce (similar to Worcestershire) also usually contains wheat. In Osaka, some dedicated gluten-free restaurants offer rice-flour takoyaki — check our Osaka guide for verified safe options.
Does dashi have gluten?
Traditional dashi (Japanese stock) made from kombu (kelp) and katsuobushi (bonito flakes) is naturally gluten-free. However, many restaurants add soy sauce to their dashi for extra flavor, which makes it unsafe. Instant dashi packets (dashi no moto) often contain wheat-based soy sauce. Always ask: 'Dashi ni shoyu wa haitte imasu ka?' (Does the dashi contain soy sauce?).
Is Japanese curry roux gluten-free?
No. Almost all Japanese curry roux — both commercial blocks (Vermont Curry, Java Curry, Golden Curry) and restaurant-made roux — contain wheat flour as a thickener. This makes standard Japanese curry unsafe for celiacs. For safe options, look for dedicated gluten-free curry restaurants that use rice flour or other thickeners. See our Best Gluten-Free Curry guide for verified celiac-safe spots in Tokyo.
Ask a Question
Couldn't find your answer? Send your question and we'll use it to improve this FAQ.