In the 1920s, Kyoto-based publisher Maria Gabou planned Western Flowers Series (You Souka Fu) based on the botanical paintings of Soun Chigusa. When Maria Gabou ran short on Soun's designs, they commissioned Rakusan to fill out the series with designs done in the style of Soun. The original printing of the series did not include indication of authorship on the designs for either artist. By 1936, the series was printed with signatures, yet the attribution of each design was inconsistent. Due to this inconsistency, signatures on designs from this series are unreliable.