| Main index | Contents of Onomastikon |
| Oriental index | Other Oriental names |
| History | A short historical background |
| Names | Naming practices, Name elements |
| Male | Japanese masculine names |
| Female | Japanese feminine names |
| Surnames | Japanese surnames, Surname elements, Noble families |
| Religion | Shinto, Gods, Buddhism |
| Emperors | Legendary, Yamato, Nara, Heian, Kamakura, Nambokucho, Muromachi, Edo and Modern Periods |
| Scripts | Kanji, Hiragana, Katakana, Romaji |