My favorite part about the coworking movement in Japan -- and I don't get much exposure to it since it hasn't arrived in force in Ogaki yet -- is that it provides a community and social reinforcement which says "Just because you're not a salaryman doesn't mean you're a homeless vagabond!" to participants. Japanese young folks, in particular, can really use that message. It is not a particularly popular message in Jap…
Is coworking a popular thing in big japanese cities? Being a salaryman since arriving in the country I haven't had any exposure to it. However I noticed the place where the Tokyo iOS developer meeting happens every month would be perfect for co-working: many rooms of different sizes, enabling people to set up some group meetings whenever is needed.
Co-working spaces have definitely expanded in the past couple years though. Co-ba in Shibuya and Hub Tokyo in Meguro are two that I have visited that seemed like they had good communities.