March 20th - Vampire Day at Baba Mikado
Vampire Savior random 3on3 - 4pm
Vampire Hunter singles(?) - after Savior wraps up
Vampire Savior team showdown - after Hunter wraps up / 7:30~8:00
Live broadcast: link
These tournaments run very quickly — there may be some exhibition games and/or hijinks in between. For the team showdown, they usually have the first and second place winners serve as captains then split people up into two groups to duke it out.
March 21st - Nagoya Street Battle at Urban Square
Street Fighter 4 3on3 - 12pm
Coming shortly before the 2010 Japanese Nationals, this event should draw a lot of heavy hitters. Gama no Abura says it's probably the last NSB.
Date TBD* - X-Mania Archives at Baba Mikado
Super Street Fighter 2 X talk show - 7pm
Live broadcast: ???
At this event they're going to show some X-Mania 8 and X-Mania 9 footage on a projector and discuss matches on-the-fly with the competitors. Tamashima, Hakase, Noguchi, Pony, Tsunoppi and Mattsun will be there for starters. The inspiration here was the X-Mania 7 DVD commentary by Otochun, Gian and Nikaiten.
Everyone who shows up will get a special DVD with the highlighted matches. That disc is one of a set of five — there will be similar events each month leading up to X-Mania 11.