look at all these halal ramen
Congratulations, about .001% of all restaurants in Tokyo are Halal?
Basic introduction to travel in Japan for Muslim tourists.
www.japan-guide.com
"
Availability of halal food
Currently, there are only a small number of halal food producers and halal restaurants in Japan. Many halal restaurants in Japan serve
alcohol, as it is difficult for restaurants here to survive without doing so. There are some restaurants that label themselves as "halal" or "Muslim-friendly" and offer a halal menu in addition to their regular menu; however, their dishes were likely prepared in the same kitchen as non-halal dishes. Visitors should exercise personal discretion when dining at such places as the businesses may not be halal in the true sense.
Halal or Muslim-friendly restaurants can be found at major
airports and a few leading large
hotels, but note that some of them require prior reservations of at least a few days for the preparation of halal meals. Non-Japanese restaurants offering Bangladeshi, Egyptian, Indian, Indonesian, Iranian, Malaysian, Moroccan, Pakistani and Turkish cuisine along with some vegetarian restaurants may also have halal food options.
For more information about halal food, it is advised to consult a local tourist information center. In
Tokyo, one such place is the
Culture Tourist Information Center in
Asakusa.
Outside of the major cities, halal or Muslim-friendly restaurants are even more difficult or often impossible to find. For visitors who prefer preparing their own meals, some
supermarkets in major cities offer halal products; however, they tend to be mainly frozen halal meats rather than ready-to-eat foods. The average supermarket in Japan does not sell halal products."
Edit: I seriously doubt all of those "Halal" ramen shops are actually halal. I would bet most if not all of them contain pork. Pork is almost ubiquitous in ramen.