共同 きょうどう創設 そうせつ しゃじゃなかったです
kyōdōsōsetsushajanakattadesu

Noun
Desu Copula

The polite, past negative form of 共同創設者

1. Was not a co-founder.; Wasn't a co-founder.

Past/Perfective
Negative
Polite
Casual Register