Board Thread:General Discussion/@comment-6904925-20200408143714/@comment-6904925-20200409122600

Also, about the Suzumushi, it is the same sword, you can tell on Bleach manga 147 (https://mangapark.net/manga/bleach-kubo/i303650/c148) the sword was placed with her, but Tosen took it in honor of her.

I think its like when Kenpachi came across his sword, he picked it off a dead Soul Reaper and it became its own.