Setting up a business in Japan (Tokyo)

Hello guys,

I am thinking of starting a company in Japan (currently reside outside japan and own a company in a different country) but need to understand what corporate laws are like: In particular, I have a business partner in Tokyo that I intend to share ownership (or at least my existing company will share ownership with my japanese partner) with but want to make sure that I structure the company in such a way that I have legal defence of my portion in case we decide to split up? I know that Japanese corporate governance is slightly different and directroship (rather than share ownership) is actuallly very important

Can anyone provide any relevant education materal in English please?