Wooo sounds like fun, every week.. nice cultural exchange (*´・∀・`)
Though I feel if we don't only import Japanese pop culture but also ethical culture into the Indonesian society that would bring us a great deal when it comes to social development and perhaps even economical in the long run (*´ω`)
Which I notice every time I visit my dear homeland I'll spot a few things we have learnt from other countries, being welcomed into shops, thanked very politely after leaving a shop, etc.
Though funnily enough I rarely saw cosplay in Japan hahaha
other than flyer handers in Akiba, dressed as maids and such, or in maid cafes where I've been in once and that is probably the only time (●´∀)ノ
I never really hung out at such areas, Ishibiki area 076 that's what's poppin'
Then 153 to Shinjuku, Shibuya man, genba d(o´∀`o)b