Board Thread:Questions and Answers/@comment-26359879-20150508000003

It's evident that sword type is factor, since uchigatanas and tantou take 1:30:00, naginata take 4:00:00 (as of yet, since there's only one) and so on.

Rarity also seems to affect smithing time, but actually I'm most curious about Kogitsunemaru. It's a 3* tachi...so why does it take 4:00:00?! o__o Slightly off topic but I also don't see why so many people want him? 