Kazuna (Kanji character pronunciation)

Snack (intimate bar, maybe seats 6~10), tucked into all sorts of odd corners of Japanese entertainment districts (which can be a small biz zone of a village or a whole section of a large city).

Kazu = one, single
Na = greens? spinach?

Connection to the door?

Could also be a woman's name (?)

Mysteries abound in Japan! Hahaha...