Nice to meet you! I know the basketball court near Tokyo, which are for free.
It is in Asaka City in Saitama. It's called "Shiroyama Park". There are 2 courts which are for 3 on 3.
Ofcourse, you don't have to reserve or pay for a rent! Only go there, you can enjoy playin' basketball!! But it's just a park, so you need to bring your own ball.
I hope you'll find good place you can play basketball freely.
Thank you.
I will go there and watch if some people are there!
I wanna mess with some japanese players and enjoy multiculture playing.
I never played against japanese.