I worked over there for a year. Dropped right into a RoR and Android shop and coded with them just like an American style one so at least anecdotally, they don't really have a different programming world.
Ruby was built in Japan. But shops like yours are rarity: in patio11's words, "Metropolitan Nagoya has literally thousands of people who can write assembly code that you’d literally trust your life to (you have before and will again, unless your sole method of transportation is bicycles), and probably only a few dozen who you’d want working on a web application."