Toba Aquarium鳥羽水族館Toba Aquarium, which Shimamura mentions in volume 8 "A Corner of the First Trip ①," is the only aquarium in Japan that keeps dugongs. The text says she lay on her back and opened her bag, recalling an otter plush holding a shell that she bought long ago at Toba Aquarium but never placed in her room. Since she was in a rebellious phase in junior high, this visit was likely when she was still called Kojima. This aquarium has the most species in Japan, and its manatees, dugongs, and otters are well known. In the novel SS, the Shimamura family except Hougetsu Shimamura go there together with Yashiro.
Source:AnitabiReport an issue