In this paper are given the descriptions of the following 13 new species of the Lycosidae from Japan: Pirata yesoensis, Trochosa aquatica, Arctosa fujiii, A. hikosanensis, A. kawabe, Alopecosa moriutii, A. hokkaidensis, Pardosa agraria, P. diversa, P. graminea, P. okinawensis, P. umida, and P. suwai.
