Responses
https://en.wikipedia.org/wiki/Battle_of_Sekigahara a conflict between the Tokugawa faction in the east and the Toyotomi loyalists in the west. The north-south conflict they mention might be https://en.wikipedia.org/wiki/Nanboku-ch%C5%8D_period a conflict between the Northern and Southern Imperial Courts.
oooh, interesting! Thanks I'll give this a read
Is there like actual historical beef between the east and west of Japan??