If he was part of the main family, then Wado should have been his to begin with and not Kuina's. I can't really see a scenario where the famed sword of the family goes to a branch family member. Instances like that only occur when the heir to the main family passes away.
@HA001 in case you didn't know, Ushimaru died on Wano roughly 20 years ago. So how exactly is Zoro related to him?
@HA001 in case you didn't know, Ushimaru died on Wano roughly 20 years ago. So how exactly is Zoro related to him?