Table 5. Number of species recorded in Japanese waters in OBIS (NDSo) and the percentage of the species recorded in Japanese waters in OBIS (PRO).
| Phylum/Division | NDS1 | NDSo | PRO (%) |
| Nematoda | 70 | 71 | 101 |
| Phoronida | 2 | 2 | 100 |
| Priapulida | 2 | 2 | 100 |
| Cryptophyta | 8 | 5 | 63 |
| Annelida | 1,076 | 529 | 49 |
| Dinomastigota | 470 | 187 | 40 |
| Sipuncula | 47 | 17 | 36 |
| Ectoprocta/Bryozoa | 300 | 85 | 28 |
| Cyanobacteria | 11 | 2 | 18 |
| Hemichordata | 11 | 2 | 18 |
| Chlorophyta | 248 | 42 | 17 |
| Heterokontophyta | 1,207 | 191 | 16 |
| Arthropoda | 6,393 | 663 | 10 |
| Cnidaria | 1,860 | 181 | 10 |
| Echiura | 21 | 2 | 10 |
| Echinodermata | 1,052 | 97 | 9 |
| Chaetognatha | 36 | 3 | 8 |
| Chordata | 4,330 | 242 | 6 |
| Brachiopoda | 73 | 4 | 5 |
| Mollusca | 8,658 | 415 | 5 |
| Rhodophyta | 898 | 39 | 4 |
| Ctenophora | 41 | 1 | 2 |
| Ciliophora | 530 | 12 | 2 |
| Porifera | 745 | 12 | 2 |
| Haptophyta | 304 | 3 | 1 |
| Granuloreticulosa | 2,321 | 11 | 0 |
| Total | 2,820 |
1
Number of described species.