Lieutenant Immamura was a male Starfleet officer who lived during the mid-23rd century. He served aboard the USS Enterprise under Captain James T. Kirk, during a historic five-year mission that starship undertook.
In 2267, Immamura was assigned to landing party number 2, under the command of Lieutenant Kelowitz. This party was searching for the missing shuttlecraft Galileo, which had crashed on the planet Taurus II. When the party was ambushed by the planet's inhabitants, Immamura suffered a dislocated shoulder and severe lacerations, which were later treated in the Enterprise's sickbay. (TOS: "The Galileo Seven")