I have no interpreter and speak no Japanese. It really hasn't been that big of a problem. Communication can be slow at times and I have not had a real conversation with anybody outside phone calls home in 3 days. Menus in the majority of restaurants around Tokyo have pictures and English descriptions on the menus. Sometimes finding the place isn't that easy because for the most part the signs are not in English and the addressing system in Japan is pretty convoluted. I haven't even tried to figure that one out. I've only used the JR system trains here and getting around is really easy. Stops are identified in English. Rush hour in Tokyo is an attraction all to itself. The trains are packed, and I mean sardine like packed. Tokyo station is huge and at rush hour it is just a sea of people.
One really noticeable thing about the parks was the lack of diversity in guests. I'm used to seeing a huge variety of people when visiting WDW. Not quite the same here. I probably came across less than a few dozen people that were obiviously foreign guests in the 2 days I spent at the parks.