Synthetic pigments imported from Germany began to replace traditional organic ones in the mid-19th century. Many prints from this era made extensive use of a bright red, and were called ("red pictures"). Artists such as Yoshitoshi (1839–1892) led a trend in the 1860s of gruesome scenes of murders and ghosts, monsters and supernatural beings, and legendary Japanese and Chinese heroes. His "One Hundred Aspects of the Moon" (1885–1892) depicts a variety of fantastic and mundane themes with a moon motif. Kiyochika (1847–1915) is known for his prints documenting the rapid modernization of Tokyo, such as the introduction of railways, and his depictions of Japan's wars with China and with Russia. Earlier a painter of the Kanō school, in the 1870s Chikanobu (1838–1912) turned to prints, particularly of the imperial family and scenes of Western influence on Japanese life in the Meiji period.