Isekai Chanko was summoned right in front of Yokozuna.

Sumo wrestler Takarayama, after his success, he believes that he'll be promoted to yokozuna, the highest rank in sumo wrestling. Instead of receiving his promotion, Takarayama finds himself summoned to another world by magic using sisters Elise, Iris, and Franca, and they don't know how to send him back. In the mean time, the magical trio are hungry, so Takarayama starts making a pot of chankonabe (a traditional stew that sumo wrestlers eat).