The Biggest Painting in the World 2020 in Rankoshi was painted by the pupils of Rankoshi Primary School of Rankoshi-cho, Hokkaido. They had a contest for its design and the best ten designs were chosen from which one each by 2nd grader, 4th grader and 5th grader were combined to make the final design. No such approach had ever been done. MR. Sato, one of the representatives in Hokkaido, took part in the process. We are very thankful to three representatives, Mr. Sato, Ms. Shirato and Ms. Shirota.