In December 2015, Agatsuma Entertainment closed its doors. The company was recently responsible for bringing three Umihara Kawase games to Windows PCs via Steam in October and November. However, due to the studio’s closure, Umihara Kawase, Umihara Kawase Shun, and Sayonara Umihara Kawase have been delisted.
People who previously purchased any of the Umihara Kawase games will still find them in their Steam libraries and inventories. However, the primary product pages for all three titles have been removed. It is still possible to find the Workshop and other pages for Umihara Kawase, Umihara Kawase Shun, and Sayonara Umihara Kawase.
Prior to their removal, all of the Umihara Kawase games were part of the 2015 Steam winter sale. Versions of Sayonara Umihara Kawase are still available for the Nintendo 3DS as Yumi’s Odd Odyssey and PlayStation Vita as Sayonara Umihara Kawase +.