| Cyperaceae | |
Carex japonica var. alopecuroides
| (D. Don) C.B. Clarke | Fl. Brit. India 6: 737 | 1894 |
| Cyperaceae | |
Carex japonica var. aphanolepis
| (Franch. & Sav.) Kük. | Index Pl. Jap. 2(1): 116 | 1905 |
| Cyperaceae | |
Carex japonica subsp. chlorostachys
| (C.B. Clarke) T. Koyama | Fl. E. Himalaya 382 | 1966 |
| Cyperaceae | |
Carex japonica var. chlorostachys
| (C.B. Clarke) Kük. | Pflanzenr. IV. 20(Heft 38): 620 | 1909 |
| Cyperaceae | |
Carex japonica var. gracilis
| Franch. | Nouv. Arch. Mus. Hist. Nat. III, 10: 78 | 1898 |
| Cyperaceae | |
Carex japonica var. humilis
| Franch. | Nouv. Arch. Mus. Hist. Nat., sér. 3 10: 77 | 1898 |
| Cyperaceae | |
Carex japonica var. japonica
| | | |
| Cyperaceae | |
Carex japonica var. minor
| Boott | Ill. Gen. Carex 2: 88 | 1860 |
| Cyperaceae | |
Carex japonica var. naipiangensis
| H. Lév. & Vaniot | Bull. Soc. Bot. France 51: 206 | 1904 |
| Cyperaceae | |
Carex japonica var. phaenocarpa
| (Franch.) Kük. | Pflanzenr. IV. 20(Heft 38): 621 | 1909 |
| Cyperaceae | |
Carex japonica subsp. subtransversa
| (C.B. Clarke) T. Koyama | J. Fac. Sci. Univ. Tokyo, Sect. 3, Bot. 8(4): 213 | 1962 |