This looks like it could be good. Loads of things going on - anime, cosplay, food, shops and more - Saw it mentioned here.
HYPER JAPAN London 2010 is a brand new Japanese pop culture event that will be held in London on 1-3 October. It will take place at T1 Hall, The Old Truman Brewery, 91 Brick Lane, E1 6QL, London
The voice cast of the anime, Milky Holmes – Suzuko Mimori (Sherlock Shellinford), Sora Tokui (Nero Yuzurizaki), Mikoi Sasaki (Hercule Burton) and Izumi Kitta (Cordelia Glauca) – will be at Hyper Japan on 2nd October.
There will also be screenings of various anime such as Cowboy Bebop, manga drawing workshops, an audience with Misako Aoki (KERA model), cookery demonstrations, introductions to sake, dance workshops and a Carnival of Cosplay.The latter event has a prize of a trip for two to Tokyo.