In this fight you'll have to deal with Tokimune and four Kunoichi.
Tokimune's stats :
HP : 2 800
EP : 418
Element : Earth
Exp : 14 750 TB : 1 340 SP : 2 550 Items : 16 Speed Gems
This boss should not be a problem. The Kunoichi are fire element, so remember to protect Karin or any other water golem. Tokimune isn't dangerous as he'll just heal, strengthen and revive his bodyguards.
Once you defeated him, you'll get the direct +20% passive skill.