| Seidlia | akkeshi | (Ichikawa & Kawakatsu, 1963) | |
| Polycelis | akkeshi | Ichikawa & Kawakatsu, 1963 | |
| Phagocata | albata | (Ichikawa & Kawakatsu, 1962) | |
| Penecurva | albata | Ichikawa & Kawakatsu, 1962 | |
| Dendrocoelopsis | borealis | Ichikawa, 1954 | |
| Dendrocoelopsis | ezensis | Ichikawa & Okugawa, 1958 | |
| Penecurva | iwamai | (Ichikawa & Kawakatsu, 1962) | |
| Phagocata | iwamai | Ichikawa & Kawakatsu, 1962 | |
| Dugesia | japonica | Ichikawa & Kawakatsu, 1964 | |
| Dugesia | japonica | japonica | Ichikawa & Kawakatsu, 1964 |
| Bdellocephala | jezensis | Ichikawa, 1954 | |
| Dendrocoelopsis | lactea | Ichikawa & Okugawa, 1958 | |
| (Sphalloplana) | sp. (Mts. Yatsu-gadake) | Ichikawa & Kawakatsu, 1967 | |
| (Sphalloplana) | sp. (of Himeji) | Ichikawa & Kawakatsu, 1967 | |
| Phagocata | tenella | Ichikawa & Kawakatsu, 1963 | |
| Phagocata | teshirogi | Ichikawa & Kawakatsu, 1962 |
16 names, including those in new combination. (Max listing set to 900)