Somuri
Yoshoku is often mistaken for simply meaning "Western food" in Japan, but it's really it's own genre, with its own distinct vibe and standard menu. Walking into a great yoshoku place feels like entering an alternate Western history, if that makes any sense.
Anyway, this place has a great ハンバーグ(hamburger steak), which is not to be confused with a ハンバーガー(hamburger sandwich).
See my Tabelog check-in here.