The item name isn't really the reason it broke, there's more to quests messing up lately than just that. We changed the item names back hoping that'd help until Grace or someone can look at the quests. We both posted on another P&B thread about this that we're aware of the issue and working on it, though!

Yeah, the Shinwa quests should be fixed now! We're working on the weird error you get from other quests sometimes.