Lieutenant Immamura was a 23rd century Starfleet officer serving aboard the USS Enterprise under Captain James T. Kirk during the mid-2260s.

In 2267, Immamura was injured by the savage anthropoids that inhabited the planet Taurus II, while his landing party searching for the missing shuttlecraft Galileo. He had a dislocated shoulder and severe lacerations. (TOS: "The Galileo Seven")