Abstract
Until now, Eosentomon brachychaetum Nakamura, 2010, was known from a single holotype collected from Mt.
Hayachine-san, Iwate Prefecture, northern Honshu, Japan. This study describes three specimens, a male, female and maturus junior, collected from Mt. Iwaki-san, Aomori Prefecture, northern Honshu. The male squama genitalis and maturus junior are described, and some specific supplementary notes, such as a description of the head sensilla and body chaetotaxy, are reported.
