| Invenusta paracnida (Karling, 1966) | Jul 15, 1975 |  |  | Das Kap Erimo.  Ein Exemplare. | 
| Invenusta paracnida (Karling, 1966) | Aug 2, 1977 |  |  | Das Kap Erimo.  Ein Exemplare. | 
| Vannuccia tripapillosa Tajika, 1977 | Aug 2, 1977 |  |  | Das Kap Erimo.  Mehrere Exemplare wurden aus Kieselsand dort gesammelt. | 
| Ezoplana oxygona Tajika, 1982 | Jul 15, 1975 |  |  | Das Kap Erimo, Bezirk Hidaka, Südhokkaido.  Die Küste bestand aus Muschelsand.  Im unteren Sandhang wurden mehrere Exemplare beobachtet. | 
| Polycelis auriculata Ijima & Kaburaki, 1916 | 1974 or earlier |  |  | South and Central Hokkaido (seaboard and the Lake Onuma districts in the Oshima Peninusula, northeastern part of the Lake Shikotsu-ko district, the Erimo Cape, the Hidaka Mountains, the Mts. Daisetsu district and the southern part Kitami Mts.) | 
| Polycelis (Polycelis) sapporo (Ijima & Kaburaki, 1916) | 1974 or earlier |  |  | South and Central Hokkaido (seaboard and the Lake Onuma districts in the Oshima Peninusula, northeastern part of the Lake Shikotsu-ko district, the Erimo Cape, the Hidaka Mountains, the Mts. Daisetsu district and the southern part Kitami Mts.) | 
| Phagocata vivida (Ijima & Kaburaki, 1916) | 1974 or earlier |  |  | South and Central Hokkaido (seaboard and the Lake Onuma districts in the Oshima Peninusula, northeastern part of the Lake Shikotsu-ko district, the Erimo Cape, the Hidaka Mountains, the Mts. Daisetsu district and the southern part Kitami Mts.) | 
| Dugesia japonica Ichikawa & Kawakatsu, 1964 | 1974 or earlier |  |  | South and Central Hokkaido (seaboard and the Lake Onuma districts in the Oshima Peninusula, northeastern part of the Lake Shikotsu-ko district, the Erimo Cape, the Hidaka Mountains, the Mts. Daisetsu district and the southern part Kitami Mts.) |