The method of identifying male and female Japanese stone turtles is as follows:

From the perspective of body size: male Japanese stone turtles are smaller, on the contrary, female Japanese stone turtles are larger.

From the tail: male Japanese stone turtles have longer tails, whereas female Japanese stone turtles have shorter tails.

Actually, the method of identifying male and female Japanese stone turtles is the same as that of other types of turtles, usually from the body shape and the tail.