The genus Crypsithyris is revised for Japanese species. Three known species, C. japonica Petersen & Gaedike, 1993, C. saigusai Gaedike, 2000 and C. crococoma Meyrick, 1934 are redescribed, and C. cana sp. nov. is described. Erroneous sexual combination of C. saigusai in the original description is corrected. Feeding habits of larvae are given.
