Table 4. Taxonomic classification of species reported in the Japan's exclusive economic zone (EEZ).
| Taxonomic group | NDS1 | State of knowledge2 | NIS3 | No. experts | No. identification guides | |
| Domain Archaea | 9 | 1–3 | ND | 10 | >10 | |
| Domain Bacteria (including Cyanobacteria) | 843 | 3–5 | ND | 10 | >10 | |
| Domain Eukarya | ||||||
| Kingdom Chromista | Phaeophyta (Phaeophyceae) | 304 | 3, 4 | 1 | 2 | >3 |
| Other Chromista | 943 | 3–5 | ND | 2 | >3 | |
| Kingdom Plantae | Chlorophyta | 248 | 3, 4 | 1 | 2 | >3 |
| Rhodophyta | 898 | 3–5 | 0 | 2 | >3 | |
| Angiospermae | 44 | 4 | 0 | 2 | >3 | |
| Other Plantae | 5 | 3, 4 | ND | 2 | >3 | |
| Kingdom Protista (Protozoa) | Dinomastigota (Dinoflagellata) | 470 | 3–5 | 0 | 4 | >1 |
| Foraminifera | 2,321 | 3–5 | 0 | 5 | 6 | |
| Other Protista | 1,410 | 1–5 | 0 | 16 | >50 | |
| Kingdom Fungi | 367 | 1–4 | 0 | 2 | 3 | |
| Kingdom Animalia | Porifera | 745 | 1–5 | 0 | 1 | 14 |
| Cnidaria | 1,876 | 1–5 | 1 | 16 | >10 | |
| Platyhelminthes | 188 | 1–5 | 0 | 2 | 1 | |
| Mollusca | 8,658 | 1–5 | 11 | 10 | >10 | |
| Annelida | 1,076 | 1–5 | 10 | 7 | 4 | |
| Crustacea | 6,232 | 2–5 | 10 | >20 | >10 | |
| Bryozoa | 300 | 5 | 0 | 2 | >1 | |
| Echinodermata | 1,052 | 3–5 | 0 | 6 | 2 | |
| Urochordata (Tunicata) | 384 | 4, 5 | 2 | 4 | >3 | |
| Other invertebrates | 1,314 | 1–5 | 2 | >10 | >10 | |
| Vertebrata (Pisces) | 3,790 | 3–5 | 1 | 15 | >50 | |
| Other vertebrates | 152 | 3–5 | 0 | 4 | >50 | |
| Sub-Total Eukarya | 32,777 | 39 | ||||
| Total Regional Diversity4 | 33,629 | 39 |