From the series of One Hundred Ghost Tales from China and Japan, by Tsukioka Yoshitoshi (1839-1892)

A warrior riding a horse in heavy rain. He is Watanabe Tsuna (953-1025), a warlord from the mid-Heian period and one of the Four Heavenly Kings of Minamoto no Yorimitsu (944-1021).
He has many tales of heroism, and this painting is based on the legend that he cut off the arm of a demon that appeared at night at Rashomon Gate in the capital of Kyoto with his famous sword, the Beard Cutter.
Yoshitoshi used black ink lines from the upper left to the lower right to represent a strong rainstorm, emphasizing the diagonal lines.