Is it legal to sell or share frozen breast milk in Japan?

I’m a new mom and I have a supply of frozen stored breast milk that my baby no longer needs.

I wanted to ask if anyone knows:

• Is it legal to sell breast milk in Japan?

• Are there any regulated or safe ways to donate or share it here?

• Do human milk banks exist in Japan, and how does the process work?

I understand there are health and safety concerns, so I want to make sure I handle this responsibly and follow Japanese guidelines.

Any advice or experiences would be appreciated. Thank you!