More an arrangement of crates and barrels than a true room, O-Washi's small workroom at the heart of the cargo hold is both brewery and pharmacy. As spotlessly clean as one can keep a ship, two large tables and several cabinets are securely bolted into the ship's frame. Two of these, the height of a Hida and nearly so broad, hold the assorted herbs and simples used to make the more common sorts of remedies as well as needles, silk twine, and bolts of fabric for bandaging and stitchwork. Any member of the crew, from the lowliest eta to the Captain himself, has open access to the materials herein, though wasting them needlessly is one of the few ways to get on the Phoenix's rarely observed but infamous bad side.
The largest cabinet is nearly enough to be considered a wardrobe and houses, amongst other things, the Isawa's own blend of sake as well as the Captain's private stock. Though he has never said so specifically, it is generally understood that magic wards the cabinet, as does a large lock bearing the Kaiu mark, the key of which O-Washi bears on his person at all times.
Being caught dipping in to the supply here is grounds for serious corporal punishment.