We reviewed classifications of the sea cucumbers (holothurians) belonging to the genus Apostichopus Liao, 1980, collected from the Sagami Bay, central Japan. Detailed examinations have led to a conclusion that some of the specimens that had once been identified as Apostichopus japonicus (Selenka, 1867) should be re-classified as Apostichopus armata (Selenka, 1867). This conclusion agrees with the report that the Japanese Apostichopus holothurians are divided into two major groups (Kanno et al., 2003).