-( Story related, cannot be missed )-
When you've freshly started the game, you will proceed from Kamiki Village into the River of the Heavens. Proceeding through the tutorial, you'll eventually come to the so-called river, only to find that it isn't quite up to legendary proportions. Further up the hill from the slab, you will be introduced to the Yomigami constellation and earn the Rejuvenation Brush Technique.