Salangichthys microdon, the Japanese icefish, is a species of icefish found in Japan, Korea and the Russian Far East.

With the recent removal of S. ishikawae to the genus Neosalangichthys[1] this species is the only remaining member of the genus Salangichthys.

This species grows to a total length of 10 cm (3.9 in).

[2] Despite its small size, it is considered a food fish and caught in commercial fisheries.

[3][4] Salangichthys microdon may show both migratory (anadromous; adults in salt water but moving to fresh water to breed) and non-migratory (always in brackish or fresh water) life histories, with both types periodically occurring together.