適格 てきかく請求 せいきゅう しょ とう保存 ほぞん方式 ほうしきであれば
tekikakuseikyū shotō hozonhōshikideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 適格請求書等保存方式

1. If it is a qualified invoice preservation method; If qualified invoice preservation methods are used.

Ba Conditional
Law