There are some fellowships offered by JSPS to do research in Japan.
If your research area is close to mine, I might be able to become a host researcher.

A list of JSPS International Fellowships that I hosted:

• Ildar Gaisin (2018 - 2021)
• Jean-Stefan Koskivirta (2018 - 2020)
• Alex Youcis (2021 - )
• Joseph Muller (2023 - )
• Stefan Reppen (2023 - )