Quote Originally Posted by lexico
You have put two complicated ideas in very clear language, in one sentence!

I took the liberty to delineate the two ideas, just so that it looks like a legal document.
Nice job, Keiichi!
Although in reality the number of short-term visitors/tourists entering Japan with have a better command of Japanese than the typical residents do of English is extremely small, so I agree it is up to the foreigner to learn a few basic phrases (I can't speak Japanese etc) but neither party should assume any business can be conducted entirely in Japanese nor should the English speaker begin with "I don't speak Japanese" or "Do you speak English?" in English. For purposes of shopping/tourist destinations/airports, there's usually at least one person on standby who is more fluent and can mediate most situations. It really isn't really necessary for one side to 'inform' the other in my view....the foreigner just begins speaking in either language and understanding is either there or not.

Most likely an conversation will be end up being an unholy combination of the two.