What a shame. We face a mounting demographic crisis from low birth rates already, mostly from economic pressures and lack of personal decisions in healthcare for women. So many wrong directions.
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> The Yamato (大和民族, Yamato minzoku; lit. 'Yamato ethnicity') or Wajin (和人 / 倭人; lit. 'Wa people')[4] are an East Asian ethnic group that comprises over 98% of the population of Japan. Genetic and anthropometric studies have shown that the Yamato people predominantly descend from the Yayoi people, who migrated to Japan from the continent beginning during the 1st millennium BC, and to a lesser extent the indigenous Jōmon people who had inhabited the Japanese archipelago for millennia prior.[5]
> Generally, the Japanese are related to other East Asians like the Koreans and the Han Chinese, but can be genetically distinguished from them.[47][48] Japanese and Koreans diverged from each other about 1.4 KYA, around the Asuka period or the middle of the Three Kingdoms period.
https://en.wikipedia.org/wiki/Yamato_people
(For comparison, the Māori arrived in New Zealand about 0.7 KYA, and are considered an indigenous people.)