The Amur Softshell Turtle (Pelodiscus maacki) looks very similar to the Chinese Softshell Turtle (Pelodiscus sinensis).
The difference is in the shape of the shield. If the shield is more flattened near the edges it is P. maacki.

1st, 2nd & 3rd photo: Maruyama Park, Kyoto, Japan, 1 October 2018
4th & 5th photo: Ritsurin Garden, Takamatsu, Kagawa Prefecture, Japan, 5 October 2018