Professional
| Nihon Sumo Kyokai | www.sumo.or.jp/eng |
| Grand Sumo Tournament in Los Angeles | www.sumotour.com |
Amateur
| International Sumo Federation (Kokusai Sumo Renmei) | www.amateursumo.com |
| United States Sumo Federation | ussumofederation.org |
| Nihon Sumo Renmei (Japanese) | www.nihonsumo-renmei.jp |
| Hong Kong Sumo Association | freett.com/hksa |
| European Sumo Union | www.eurosumo.com |
| Bulgaria Sumo Federation | www.sumobg.com |
| Czech Sumo Union | www.sumo.cz |
| Finland Sumo Association (Finnish) | www.sumoliitto.net |
| Sumo Verband Deutschland (Germany) | www.sumo-verband.de |
| Great Britain Sumo Federation | www.sumo.org.uk |
| Hungarian Sumo Federation | www.sumo.hu/ |
| Sumo Bond Netherland (Netherlandish) | www.sumobond.nl |
| Polish Sumo Federation (Polish) | www.sumo.org.pl |
| Sumo Federation of Russia | www.sumo.boom.ru |
Sumo Club in U.S.A.
| Centurion Sumo Club (CA) | www.centurion.sumoclub.com |
| Judo/Karate Center | www.cranfordjkc.com/Sumo.htm |
| Oceanside Sumo Club (CA) |
Organizations
| Consulate-General of Japan in Los Angeles | www.la.us.emb-japan.go.jp |
| Japan Foundation | www.jpf.go.jp/e |
| Nisei Week | www.niseiweek.org |
| Sumo Shimpo | www.sumoshimpo.com |
| Sushi & Sake Magagine | www.sushiandtofu.com |
| The Los Angeles Fit Expo | www.thefitexpo.com |
