上代 じょうだい特殊 とくしゅ仮名遣 かなずかいだったら
jōdaitokushukana zukaidattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 上代特殊仮名遣い

1. If it were Old Japanese orthography; Were it Old Japanese orthography

Tara Conditional
Linguistics