Complex sentence: The son of a government official, Kiyochika was heavily influenced by Western art, which he studied under Charles Wirgman; he also based a lot of his work on Western etchings, lithographs, and photographs which became widely available in Japan in the Meiji period.
Split into simpler sentences: The son of a government official, Kiyochika was heavily influenced by Western art, which he studied under Charles Wirgman. He also based a lot of his work on Western etchings, lithographs, and photographs which became widely available in Japan in the Meiji period.