The Book of Imitation Mountains is a work written by Wang Chong, a famous calligrapher of the late Ming and early Qing Dynasties, and was written and engraved by his son Wang Wujie. "Gouzanencho" is a masterpiece of Ohtaku's calligraphy, and has been highly praised by successive calligraphers as it combines various calligraphy styles and intensively shows the diverse calligraphy styles of Ohtaku.