In what way were the Yamato rulers of Japan bolstered by adopting Buddhism as the state religion?

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By adopting Buddhism as the state religion, the Yamato rulers were able to link themselves to a universalizing religion that stretched from India to Korea, giving them a sense of connectedness with other powerful kingdoms in the region. This lent them legitimacy, and the adoption of Buddhist values and practices helped to bolster their rule.

In What Way Were the Yamato Rulers of Japan Bolstered