Grill Yamada
A beloved sauce-katsu-don restaurant nicknamed 'Guriyama' by locals. The yellow building is the landmark. Queues form on holiday weekends — often called 'the best sauce katsudon in Fukui.' Mix-don (pork, shrimp, and beef cutlets) is the top seller.
Yahoo rating 3.91, 55 reviews. TripAdvisor 4.3/5, 23 reviews (3rd in Katsuyama). Retty recommendation rate 93%. Many reviews say 'the sweet-savory sauce is superb,' 'huge portions,' and 'locals come every week.' Queue reviews confirmed ('waited from opening time'). Supported primarily by local regulars, not tourists.