With English as the dominant language used by Linux developers in much of the world, Japanese and Chinese software and hardware developers have a huge hurdle to overcome. Having enthusiastic attendees at Linux symposiums staged in Japan does help, but culture and language differences still get in the way.
The worldwide open source community shares a common overall goal: better software through collaboration and peer review. It's difficult enough to achieve this task even when most of the participants share a common language. Building bridges between different parts of the world -- especially between Eastern and Western societies -- adds an entirely new element to the equation.