|Service/branch||Earth Defense Force|
Shinji Nomura (1974-1983)|
Maiko Skorick (2010)
Masato Kokubun (2011-)
Ensign Yoshikazu Aihara (相原義一 Aihara Yoshikazu/Giichi )
- chief communications officer, Aihara becomes homesick during the journey to Iscandar after discovering his father on Earth was dying; in his madness he steals a spacesuit and attempts to float home before being rescued by his comrades. A Gamilan relay satellite had been the cause of the stressful transmissions reaching the Yamato, and Aihara destroyed the satellite.
- In Japanese, the kanji for his given name can be read in two ways; the reading "Yoshikazu" is used in episode 10 of the first season, but (owing to an error) he gives his name as "Giichi" in the third season.
- Aihara's favorite song is Kitakami Yakyoku (北上夜曲).