Ohara Koson (1877 – 1945) was a Japanese painter and print designer of the late 19th and early 20th centuries, part of the shin-hanga ("new prints") movement.
In Tokyo, he produced some ukiyo-e triptychs illustrating episodes of the Russo-Japanese War, but most of his production was prints of birds-and-flowers (kacho-e).
He worked at first with publishers Akiyama Buemon (Kokkeido) and Matsuki Heikichi (Daikokuya), signing his work Koson. Starting around 1926, he became associated with the publisher Watanabe Shozaburo, and signed his work Shoson. He also worked with the publisher Kawaguchi, signing his works Hoson.