Umihara Kawase - Umihara Kawase Portable

Although based almost entirely on the level design and visual aesthetic of the Shun games, Umihara Kawase Portable nevertheless disappointed fans and critics alike on release, due to a bug-ridden physics engine, which differed in crucial aspects to its predecessors. Further criticism was levelled at the new visual perspective, which sometimes interfered with play. On July 14, 2008, it was announced that the game would be coming to U.S. under the title Yumi's Odd Odyssey,; however, this release never came about. It would have been the first Umihara Kawase game to have been released outside of Asia.

Umihara Kawase Portable was not developed by Super Famicom and PS version developer, Kiyoshi Sakai, instead being developed by Rocket Studio. Many Japanese fans felt anxious about Umihara Kawase Portable prior to release, and were disappointed and angry afterwards. Accordingly, they protested Marvelous Entertainment sales agency and Motion Bank, and staged a boycott.