Taxa included

Morikawa, K. (1952b). Notes on the Japanese Pseudoscorpiones I. Memoirs of Ehime University (2B) 1: 249–258.

Taxon
Allochthonius anthracinus Morikawa, 1952 (Pseudoscorpiones: Pseudotyrannochthoniidae) 250, fig. 1 (synonymised by Morikawa, 1955a: 215), Allochthonius anthracinus
Allochthonius yanoi Morikawa, 1952 (Pseudoscorpiones: Pseudotyrannochthoniidae) 251–252, figs 2–3, 4a–c (synonymised by Morikawa, 1955a: 215), Allochthonius yanoi
Parobisium magnum ohuyeanum (Morikawa, 1952) (Pseudoscorpiones: Neobisiidae) 252–253, figs 5–6, Neobisium (Parobisium) ohuyeanum
Pararoncus japonicus (Ellingsen, 1907) (Pseudoscorpiones: Syarinidae) 253–254, figs 7–8, Roncus (Roncus) japonicus (Ellingsen)
Microbisium pygmaeum (Ellingsen, 1907) (Pseudoscorpiones: Neobisiidae) 254–255, fig. 9, Microbisium pygmaeum (Ellingsen)
Microcreagris ishiharanus Morikawa, 1952 (Pseudoscorpiones: Neobisiidae) 255–256, figs 10–12 (synonymised with Microcreagris cyclica by Morikawa, 1955a: 216), Microcreagris ishiharanus
Anchigarypus japonicus (Beier, 1952) (Pseudoscorpiones: Garypidae) 256–257, figs 13, 14a–b, 15, Garypus