Now we are going full Japanese for this next title.

Harimanada has recently been promoted to Yokozuna, the highest rank in Sumo Wrestling, but upon receiving such an honour has shown up to the ring wearing a demon mask declaring that he will beat the record of 69 consecutive wins and will retire if ever defeated; such a declaration and lack of respect for the ancient customs of Sumo Wrestling has invoked the wrath of the Sumo Association who want to see Harimanada defeated.
Harimanada is an odd character for a sports genre anime, he's no underdog, his attitude doesn't lend itself to being well liked and his constant winning streak really gets old especially when other Sumos offer more to themselves only to get smacked down.
The only way to really see this anime is as an art piece on fighting for action not the reason; Harimanada is already the highest rank possible so beating the winning record is really the only thing left for him to accomplish but he approaches it as if it were an after thought and going against tradition much to the Chagrin of the Sumo Association means fighting without distraction as well as forcing other wrestlers into the ring by making himself a villain.
What happens in the end is spoilers but you can't help but watch it to the end just to find out Harimanada's fate.
It's way too Japanese to have a dub but some countries did licence the Sega game.
Final Verdict: Very much a matter of taste in anime as to whether or not you'll like this, as for me I understand the art form but wish it was shorter than 23 Episodes.