| Wikidata qualifier | Q15720608 |
| transliteration system | Q20085670 |
| Wikidata property with datatype string that is not an external identifier | Q21099935 |
| P3254 | property proposal discussion | https://www.wikidata.org/wiki/Wikidata:Property_proposal/Archive/36#P2125 |
| P1896 | source website for the property | https://dl.ndl.go.jp/pid/2466941/1/10 |
| P2302 | property constraint | allowed-entity-types constraint | Q52004125 |
| property scope constraint | Q53869507 | ||
| format constraint | Q21502404 | ||
| lexeme requires language constraint | Q55819106 | ||
| P1659 | related property | ISO 15919 transliteration | P5825 |
| P2668 | stability of property value | never changes | Q23611288 |
| P1647 | subproperty of | transliteration or transcription | P2440 |
| P1629 | Wikidata item of this property | Hepburn romanization | Q667558 |
| Q667558 | Hepburn romanization | Wikidata property | P1687 |
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