しいのとうかきのこであれば
椎の灯火茸であれば
shiino tōkakinokodeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of しいのともしびたけ

1. If it were a Shiino-tomoshibitake mushroom:; If it is a Shiino-tomoshibitake mushroom:

Ba Conditional
Usually Written in Kana