Hm, when I was there the good deals on cameras only came in Japanese language with no way to change it to english even with a firmware flash.
There's a Sony store in Ginza, from memory, that sell english versions of cameras however they seemed to be a generation behind e.g. they didn't have the Sony RX-100 IV at the time only the III
Might have better luck with audio but wasn't something I was looking out for but there's plenty of electronic stores e.g. Bic Camera and Yodobashi some of which have 10+ levels to wonder through.
Also don't forget they're 100v there