Shinshū Maru (神州丸 or 神洲丸) was a ship of the Japanese Imperial Army during World War II.

During her career, she was outfitted with a dummy forefunnel in an effort to disguise her as the submarine tender Taigei, which was converted to the light carrier Ryuho.

Shinshū Maru was one of the ships sunk by friendly torpedo fire at the Battle of Sunda Strait, but later salvaged and returned to service.

Shinshū Maru was a significant advance in amphibious warfare, having incorporated numerous innovative features, and as such she was shrouded in a veil of secrecy throughout her existence.

These concepts pioneered by Shinshū Maru persist to the current day, in the U.S. Navy's LHA and LHD amphibious assault ships.