It is threatened by habitat loss and racoon (araiguma) predation.

Many different species of amphibian have unbalanced sex ratios.

This trend is no different in Hynobius Tokyoensis; the sex ratio between males and females is about 1.5:1.

Although this does not play as large of a role as habitat destruction when it comes to the decline of this species, it is still significant.

[2] Considering their environmental preferences, they are usually found in paddy fields.