だい よん しゅ郵便 ゆうびん ぶつではありませんでした
dai yonshu yūbimbutsudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 第四種郵便物

1. Was not fourth-class mail.; Was not registered mail.

Past/Perfective
Negative
Polite
Formal Register