Shinen is home to numerous creatures including birds rarely found in areas inhabited by humans such as the common kingfisher and northern goshawk, the Japanese Pond Turtle which has waterweed growing on its shell, and the Asian Yellow Pond Turtle which is extremely rare in Japan.
神苑には人里には少ないカワセミや大鷹などの鳥類や、甲羅に草を生やすミノガメ、日本では非常に珍しいミナミイシガメなどが棲息している。