Yaichi

Yaichi sits in Milpitas, one of San Francisco's neighborhoods where authentic Japanese kitchens have taken root. The house does not publish an online booking link; call ahead to secure a seat, especially on weekends. Check the posted hours before you go — traditional donburi restaurants often close between service periods.

• Kaisendon — the seasonal seafood rice-bowl tradition straight from Tokyo's fish markets — is nearly impossible to find executed at this level outside Japan.
• Handmade Sanuki-style udon prepared on a machine imported from Japan delivers a texture and sardine-dashi broth depth that sets a new standard for udon in the South Bay.
• The interactive kaisendon eating format — rolling rice into nori, mixing wasabi, finishing with poured dashi — makes every bowl both a meal and a mini-lesson in Japanese food culture.
• The third restaurant from chef Nobu Kashima's growing family of authentic Japanese concepts, each exploring a different dimension of Japanese cuisine with rigorous sourcing.