"Speed-Boarding" was not right. It was actually "Speed Boating", according to a news article in English.
http://www.afp.com/english/news/week/theme1/current/light/980130140307.qdkjoeqv.html
Also, CNN-SI site have a great Nagano Olympic News site full of detailed
news everyday.
http://www.cnnsi.com/olympics/events/1998/nagano/
In those news, I've found an article about Sumo, Akebono and amateur
sumo federation.
http://www.cnnsi.com/olympics/events/1998/nagano/news/1998/01/28/sumo_wrestler/
-Toshiyori Masumiriki
Masumi Abe wrote:
International Olympic Committee voted to recognize International Sumo
Federation as a "temporally-recognized athletic organization" along with
the international organizations of Body-Building, Speed-Boarding and
Mortorcycling. These organization's status will be staying as
"temporally" at least for two years before voted into the elite
organization of "officially-recognized" organization by IOC members.Some of the other "temporally" organizations are Dancing, Surfing, Rugby
and Karate. To be eligible for official voting process, the sport need
to be played at least in 75 countries over 4 continets for a men's sport
except winter sports, for example.