welcome.visit-hokkaido.jp — the official directory. Filter by provision (halal-certified, no haram ingredients, Muslim utensils, prayer facilities) rather than one blanket label.
Halal Navi
Recent traveller reports on halal and Muslim-friendly places in Sapporo. Confirm status directly.
Halal Gourmet Japan
halalgourmet.jp — searchable restaurant listings.
Muslim Guide Japan
muslim-guide.jp — Hokkaido restaurant listings.
Useful area: the Kita 14 Jonishi / Hokkaido University neighbourhood around Sapporo Masjid has the most halal-certified and Muslim-friendly options, including the WATAN halal grocery for self-catering.