And they look for every information they can get when back home:
Sumo coverage on NHK news - JSTV

In English there is a mass of excellent information about Sumo on the net, so I will publish only one rare subject of my special interest here. 

  Money figures in sumo

• The Rikishi income 
  • Basho Bonus for career achievements
  • Basho allowance for Sanyaku and lower divisions
• Prize money - Kensho, Yuusho, Sansho - other income
• Oyakata and Heya Income
• Sumo Kyokai Income

The Nihon Sumo Kyokai (Japan Sumo Association) has its own web site http://www.wnn.or.jp/wnn-t/ in English and Japanese with the newest and many historical information and pictures. 

Two sites for Sumo FAQ, where you could look for basic information, are http://www.scgroup.com/sumo/faq/
http://w3.clat.hi-tech.ac.jp/sumo/FAQ.html

The biggest collection of sumo links on the whole internet:
http://home.interlink.or.jp/~egashi/sumolinks/e.html

To get the most recent information on nearly everything going on in sumo, join: 

The Sumo Mailing list

Send "Subscribe sumo" as a message with no subject to: Majordomo@statgen.ncsu.edu 

To find out more about the sumo fans who enjoy being member of this list, visit 
the Sumo Mailing List Members Page http://sumofans.com/. 

You will also find the cyber-rikishi Akinomaki on this page ...

And the searchable archive of the ML is among the best you can find on sumo anywhere: http://www.banzuke.com/

At the same address you can find the rankings (banzuke) for sumo since the year 1757 !