Illustrations for the Japanese folktale "Mouse's Sumo" or "Nezumi no Sumō " (ねずみの相撲)

I made some changes in the tale itself so it would be adapted adequetly for the Russian audience. 

It tells a story of a slender mouse, who lived with the old poor copule. Once the crops died and the couple was left starving. The slender mouse decided to help them. It didn't know what to do, so it decided to take a walk - maybe, some opportunity would turn up. It stumbled upon the "sumo club", which was led  by the fat mouse. Fat mouse offered anyone an opportunity to challenge it to a battle in hopes to win a golden coin. However, the one willing to fight had to give the fat mouse a rice cake, because the it loved those. The slender mouse returned to the old couple and they decided to help her. They made the rice cakes from what little was left from rice they had. First two tries didn't go well. Before the third time the old woman baked the last rice cake and the man gave some salt for luck to the mouse and thanks it for it's efforts and care for them. With that the slender mouse went to battle the fat one for the last time (the old couple had nothing left to eat). It sprinkled the ring with salt and started to fight. It won and got the golden coin as fat mouse promised. Since that day the slender mouse started winning match after the match (bringing rice cakes as entrance fee). After some time the old couple became rich and went often to watch the mouse's sumo.