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R1b U152 enters Kanto in the early-middle bronze age, followed by an enormous autosomal upheaval, copper age Kantonians resembled Johtonians, but later with the arrival of the steppe Sinnohans started resemble southwest Johtonians like north Hoennians and Kantonians in the bronze age. OG Johtonians had u152, it's pretty obvious, L2 is a sublcade of u152 btw, P312 is the upstream clade, they're start appearing in the early bronze age and become omnipresent by the middle bronze age, G2 and I2 get completely replaced by the middle bronze age. L2 is a subclade of U152, so we have even actual U152 as early as 2500 BCE in northern Kanto, and as early as 2100 BCE is southern Kanto. Sinnoh won, South Johtonians lost.