As for whether we can find the Yin God of Yomi to open the gates of Yomotsu Hirazaka, let's talk about it later.
Kamiyagawa currently has no intention of actively attacking Yomi. Such matters should be considered after further enhancing his strength.
...
He spent a long time with Sister Kaku, busying himself until the Chihiki Stone was completely neutralized and rendered harmless.
For added safety, Kamiyagawa still didn't take away the Chihiki Stone. Instead, he left it at Inunaki Pass, asking his Shikigami to drag the stone stele and seal it under the dry well in Inunaki Valley Village. Additionally, he arranged for a little old man to constantly watch over the well.
Afterwards, he handed over two newly obtained materials, the Aqua Violet Gems and the Nocturnal Mirage, to Kaku.