The Mysterious Clover
In 1934, Matsumoto drew his first full-fledged manga. The Mysterious Clover (？（なぞ）のクローバー, (Nazo) no kurōbā) is a 16-page story of a young girl freeing the poor villagers and farmers from the cruel and mercenary nobles.
The booklet came as a premium in the April issue of Shōjo no Tomo, twice the size of the magazine. It is considered one of the first mangas in Japan using varying perspecitves, including bird's-eye views, and variations in the size of panels.