Engrish is mandatory for all Japanese from 8th~12th grade in Jr./Sr. high school. The teaching stresses grammar and is generally taught by people who regurgitate the same thing they've taught for years, and who couldn't put a sentence together to save their lives. Hence, most Japanese can read simple terms, but can't speak it, and it is a common source of embarassment for many, "Oh no, I don't speak Engrish, a rittle, rittle..." That being said, there are those who have lived overseas and sound like they aren't Japanese (one person I'm very close to comes to mind).
Regarding Chinese, learning it for "business" reasons could be a nightmare as is doing business in/with China. You may want to try learning Japanese instead as the pronunciation is much easier, as is doing business, but maybe that doesn't jive with your plans. Good luck.
Thanks, I appreciate it.