Unibet.
I never heard about anyone betting on sumo. For 99% of gaijins is sumo some funny event where 2 fat perverted people play a comedy. For outsiders the sumo is mentally right next to used girl's underwear that is supposedly for sale in vending machines. Simplification of Japan that no one understands but looks bizarre.
We are all bloodsucking ticks, hungry, devious
each one latched on to the ass of the previous
when the last and the first latch on it can be shown
ass-blood sucked by the first from the last is his own