This underwater battle scene appears to be quite rare among the Sino-Japanese war prints designed by the artist Kobayashi Toshimitsu (active 1877-1904). Information about the artist himself is also limited.
The Graphic Arts Collection holds two copies of Toshimitsu’s more popular print Our Army’s Great Victory at the Night Battle of Pyongyang (Heijô yasen wagahei daishôri) seen further below. They both have the artist’s seal: Suidô shujin, and each include graphic depictions of war.