Shop
The shop appears randomly like other safe zones - unless you have the Member's Card upgrade, in which case it appears at the start of every floor.
The track that plays in the shop normally is the first variant of Mochi Yasan. In the underwater shop, the second variant plays.
The three display cases are stocked in tiers: the first case holds only the cheapest consumables, while the priciest, Energy Drink and Curry, only ever appear in the third. When the player is at 2 HP or less, the first case is guaranteed to hold a Rice Ball.