Thanks for sharing. I take it you’re not a Japan national to begin with. Do you plan on living there, planting roots?
I wouldn't discount the difficulties of not knowing the local language. Living in Japan is not easy if you do not speak or understand Japanese. Every single form or application is in Japanese. All government related procedures are in Japanese. Banner signboards & instructions too. You'd miss out on several important bulletins e.g. tax instructions, license updation etc., if you read only the EN versions, as Japanese ones are more detailed & explanatory. One-to-one translation of information is not guaranteed with such documents.