Dosukoi Densetsu is a sumo wrestling simulation game in which you can train your sumo wrestler or a group of them (in different kinds of trainings, give him food and send him to rest) and then go into tournaments and try to win them.
You have a trainer (the owner of the dojo) that will try to make work harder the sumo wrestlers, a somekind of manager that will try to hire new sumo wrestlers for the dojo, and different sellers that will bring different kind of meals to the sumo fighters. Depending of the things they eat and the training and rests that they do their stats will increase or decrease.