There may be even more events out there, but six over two weekends is probably enough for anyone:
(Osaka - Nakanoshima Park) -- 10/10~10/13 (11:30 - 21:00)
Approximately 50 craft beers from several Japanese breweries.
Garage 39 1st Anniversary / GARAGE39 一周年 -- 10/10 (17:00 - 26:00)
Craft Beer Night and Buffet at Cafe Absinthe -- 10/12 (17:00 - )
Brews from Baird Beer and Sankt Gallen. Two-hour nomi hodai and buffet.
Co-sponsored by BEER ZEN magazine and dig beer baR. Featuring Washington State craft brews imported by Beer Cats, including Elysian Brewing, Schooner Exact, and Wingman Brewers.
Yellow Ape Craft 2nd Anniversary -- 10/18 (15:00 – 26:00)
This one could get crowded.
Oono-Ya 4th Anniversary / 焼きとりと地ビール おおの家 4周年 -- 10/19 (15:00 – 22:00)