Lieutenant Immamura was a male Starfleet officer in the 23rd century. He served aboard the USS Enterprise in 2267 under the command of Captain James T. Kirk, during a historic five-year mission that starship undertook.
That same year, 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 sickbay. (TOS: "The Galileo Seven")
This character was only mentioned in dialogue.