Definition of 四つ仮名 (よつがな)
よがな
                        四つ仮名
よつがな
yotsugana
noun
•
        
yotsugana, the four kana (ji, di, zu, du)(linguistics)(じ,ぢ,ず,づ)
Related Kanji
| 四 | four | 
| 仮 | sham, temporary, interim, assumed (name), informal | 
| 名 | name, noted, distinguished, reputation |