Earlier quoted context omitted.
why not pay to bring immigrants who can start their families without caring much about making them to bear japanese children in the first place? that sounds like you want human ovens because your own machines are outdated. That is..... uh... bad lets say i am given incentive to move to japan and start a family there, i would contribute to the workforce, the children would be "japanese" anyway because they would be bo…
Japanese don't want non-Japanese (non-Yamato) people in there. Even 1/4 non-Yamato people face discrimination, and half-Japanese essentially have sub-human status. Even if the other half comes from richest and most civilised countries on Earth. Also seriously, no foreigners understand Japan. I don't think this is a country someone from the outside can really integrate there.
I lived there for years and have known many people with mixed heritage, including my own children. Many choose to live in Japan because they feel comfortable there and that it is their home.
Modern Japan has millions of immigrants, and is thankfully free of the weird borderline eugenics stuff you’re proposing in your first comment.
Making babies isn’t an end goal. Children need to be raised in loving caring families in order to thrive.