Event on Booth.
Doujin fair dedicated to original works.
Live video viewing event.
Name originates from "Friends".
Series of Kagamine Rin/Len only events.
Music Media-Mix Market, or M3, is a bi-annual flea market for independent music makers to sell their goods.
An annual UTAU-only event.
Vocaloid event where artists sell albums and other merchandise. Lately UTAU artists have participated as well.
VOCALOID only event in Taiwan, China.
Kagamine Rin & len only event
Unofficial Magical Mirai after party.
Nico Nico Chokaigi is a yearly convention/festival hosted at Makuhari Messe, Chiba (near Tokyo). Generally there's multiple Vocaloid-related events as well, such as The Voc@loid M@ster.
Series of concerts held near Miku's birthday (August 31st).