Kumoricon began in 2003 in Springfield, Oregon for two days on Thanksgiving weekend. From 2004 to 2015, it was located in the Portland, Oregon metro area and held all three days (and in some years four days) of Labor Day weekend. In 2016, it moved to the Oregon Convention Center and takes place around Halloween time. Kumoricon is the largest anime convention in the Portland metro area and in Oregon. Kumoricon's staff are all volunteers.
Kumoricon is a production of Altonimbus Entertainment, an Oregon nonprofit public benefit 501(c)(3) organization. Kumoricon is a 100% volunteer-run event, including its executive staff and board.
Founded and held in 2003, Kumoricon is celebrating twenty plus years of anime and Japanese culture. Gaining its namesake (kumori) from the Japanese word "cloudy", we embody everything it means to live in the Pacific Northwest and love this fandom. Stretching across generations, anime fans have gathered together for an amazing annual event, rain or shine. Returning to Portland, Oregon, we are excited to bring you another wonderful anime convention designed and operated with the fans and their devotion in mind.