Talk:Upgrades/@comment-32130276-20170714002032/@comment-26836692-20170714162326

You must have your tantou at level 60 or more and the Kiwame items. I've heard that you also have to clear map 6-4 before being allowed to send a sword to Kiwame Training.

If you got that all, you're good to go.

I guess the saniwa's level must vary quite a lot.