| Reference no. | Description | year | Name used | Page |
|---|---|---|---|---|
| 1394 | Jefferson, T.A., S. Leatherwood and M.A. Webber 1993 FAO species Identification Guide: Marine Mammals of the World. Rome, FAO. 320 p. + 587 figures. | 1993 | Zalophus californianus japonicus | 230-231 |
| 1522 | Rice, D.W. 1998 Marine Mammals of the World Systematics and Distribution. Special Publication number 4: The Society for Marine Mammalogy. 231p. | 1998 | Zalophus japonicus | 29 |
| 19 | Bisby, F.A., M.A. Ruggiero, K.L. Wilson, M. Cachuela-Palacio, S.W. Kimani, Y.R. Roskov, A. Soulier-Perkins and J. van Hertum 2005 Species 2000 & ITIS Catalogue of Life: 2005 Annual Checklist. CD-ROM; Species 2000: Reading, U.K. | 2005 | Zalophus japonicus | --> |
| 127697 |
IUCN 2022 The IUCN Red List of Threatened Species. Version 2022-1. |
2022 | Zalophus japonicus | --> |
| 130435 | IUCN 2025 The IUCN Red List of Threatened Species. 1964 - onwards. https://www.iucnredlist.org/ | 2025 | Zalophus japonicus | ver.2025-1 |