HySy ArtMask Studio is a shop located in the 4th ward. The shop is owned by Uta and this is where he sells his handmade masks. Most of its customers are ghouls, but there are also some human customers.
- In the studio, some special masks make appearances on the walls:
- One from the Tokyo Ghoul Oneshot: oneshot Ken Kaneki's mask appears in Chapter 11 of Tokyo Ghoul, when Kaneki and Touka Kirishima first visit the shop.
- One from Tokyo Ghoul: Jail: Rio's rinkaku mask appears in Chapter 38 of Tokyo Ghoul:re, when the Quinx visit Uta's shop.
- A clown mask can be seen on the wall when Ken Kaneki and Touka Kirishima first enter.