Isshin continues his explanation, stating that if one is caught by the Kōryū, they will become stuck and die, while if one is chased by the Kōtotsu, they will be flung into a time far removed from when they entered the Dangai. Isshin tells a confused Ichigo that when 1 year passes outside the Dangai, 2,000 years will have passed in the Dangai. Ichigo asks Isshin Kurosaki what he meant by being able to teach him the Final Getsuga Tenshō here and Isshin explains about how the Dangai is an isolated space which is surrounded by numerous stacked-up layers of time's current, resulting in it being a place where the density of time within it is extremely high when compared to other exterior dimensions.