International versus public kindergarten?

I, my wife and 2yo son are moving from the US to Sendai this winter and considering kindergartens. There seem to be quite a few options, and I’d like to narrow down between international and ‘normal’ public schools. We want our kid to learn Japanese, to make friends, assimilate and all that. But, here’s the kicker, neither one of us speaks Japanese at all lol. We’re obviously going to learn, but it’ll be slow. Kid speaks English and Mandarin and will pick up Japanese one way or the other eventually, so I think it’s mostly a question about social dynamics both for him and, distantly secondarily, for us. I’d love to hear your experience and/or if anyone has direct recommendations for Sendai that would be extra great!

My wife is currently staying home, salary is 11m.

by Tako_Poke