骨髄 こつずいバンクじゃなかったです
kotsuzuibankujanakattadesu

Noun
Desu Copula

The polite, past negative form of 骨髄バンク

1. Wasn't a bone marrow donor.; Didn't register for the bone marrow bank.

Past/Perfective
Negative
Polite
Casual Register