To people in tokyo its mportant to know that its how japan attacked china and tokyo made a change
They became sedentary. they started to use agriculture to create a surplus of food and as the need for farmers decreased; different duties emerged and that led to the formation if civilizations.
Settlers encouraged assimilation because they didnt want to just force them off of their land they wanted to have alternate ideas and it didnt really work although some did assimilate.