Hatakeyama is definitely plotting shytting. It is clear that Kiichi is killing for his own reasons, but if this really was a concern for Hatakeyama, he would have taken care of it naturally like Jinya said. His reason for not having the other demon under him take care of it felt like bull crap. Even so, he also has Kiichi out to target Jinya.
The conversations in this episode between Ofuu & Jinya really has shown the growth and the potential of growth for him. As the weakness in him is the bonds he formed. Whatever Hatakeyama is planning is going to have an effect on so many people, and wanting to make the right decision is important.
Kiichi & Jinya's fight is interesting. For Kiichi is one who desires strength and to reach those heights. He is mind is set in what he wants to accomplish. As mentioned, Jinya has a lot going on. He has made connections with people, lost some of them & now has a daughter. This is what Kiichi calls excess. These are things that would get in the way of becoming stronger. Kiichi does win, but Jinya offers enough of a challenge that Jinya isn't killed. Of course it makes sense from Kiichi's perspective. If someone who has excess can give him a challenge then clearly he has potential to grow. In the future, Jinya could offer an even bigger challenge, which would aid in Kiichi's pursuit of strength.
Seeing Jinya & Kiichi in the future is interesting. For Kiichi, he had to adjust to the times, but he can find enjoyment still. Which is cool. I love Jinya's answer that the excess wasn't meaningless. So while his sword doesn't cut through everything, the connections he has built are vital. Also, Kaoru's joke feels like not an actual joke. Curious if we get to see when she and Jinya first meet.