[1][2] Watanabe employed highly skilled carvers and printers, and commissioned artists to design prints that combined traditional Japanese techniques with elements of contemporary Western painting, such as perspective and shadows.
Friedrich Capelari [de], Hashiguchi Goyō, Charles W. Bartlett, Itō Shinsui, Kawase Hasui, Ito Takashi, Yoshida Hiroshi, Kasamatsu Shirō, Torii Kotondo, Ohara Koson, Tsuchiya Koitsu and Yamakawa Shūhō are among the artists whose works he published.
[3] Much of his company's stockpile of both prints and their original printing-blocks was destroyed in the Great Kantō earthquake of 1923.
Watanabe exported most of his shin-hanga prints to the United States and Europe due to a lack of Japanese interest.
Watanabe designed two prints himself under the name "Kako": Sunset Glow at West Park in Fukuoka[4] and Lake Kawaguchi.