だんぺいきさこじゃなかったです
團平喜佐古じゃなかったです
dan peikisakojanakattadesu

Noun
Desu Copula

The polite, past negative form of だんべいきさご

1. Wasn't a group outing.; Wasn't a party.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana