Board Thread:Questions and Answers/@comment-186.34.182.153-20151101144009/@comment-24356739-20160411004219

Yes, but you have to make sure the Waki are stronger, probably in lv50+ as they couldn't take out R5 yari in one-shot sometimes.

You can level the swords with oodachis or other tachis in Era 4 first to get them a better starting level at 6-1.

Good luck!