Sankaku Market is a seafood market next to Otaru Station that sells kaisendon and seafood such as hairy crab and sea urchin. When hairy crab is ordered at a restaurant, it is selected directly from a seafood shop inside the market and brought over, and dried scallops and king crab are also available. The market is an indoor alley-style space where seafood shops and restaurants are connected, with several kaisendon shops gathered together. Waits at restaurants often exceed one hour.