I noticed that the editor for WSJA was on twitter and mentioned that a certain romanization in One Piece came from Oda himself. So, out of curiosity I asked if character name romanizations in Bleach came from Kubo. This is what I was told.
"Yes, but sometimes we dont get them till late. In latest issue is Hashvalt but its not official yet. We will fix when we hear."
Here is the link. https://twitter.com/AlexisKJump/status/262982938596102144 I also asked if Yhwach was the correct name for the Quincy leader. It seems to be correct. Although I think she's confused about Yhwach being a title and not his name or something. I guess this means Yhwach should be used instead of Juhabach. It seems the only unofficial name right now is "Hashvalt"
Now, let arguments commence! XD