|First appearance||The Holdout|
|Voiced by||Togo Igawa|
|Languages||Japanese (native), English (fluent)|
|Occupation||First Lieutenant of the Japanese Army|
|Family||Hatsumi (wife), Keiko (daughter)|
Kentaro (whom Archer refers to as "Ken") attacks Archer while the latter is on a solo mission. Sato believes that Archer, being American, is his enemy. Archer uses his satellite phone to show Sato that the war is over, but Sato is still skeptical. It is only after Archer falls asleep that Sato looks at postwar footage on Archer's phone and accepts the truth.
Archer wakes up in horror to see Sato watching reports of the atomic bombs being dropped on Japan at the end of WWII. Sato kicks Archer in the ribs. He then relents and decides to help Archer finish his mission so that he will be able to go back to Japan.
Towards the end of "The Holdout" Archer has a actual moment of decency. Archer calls Sato's wife Hatsumi, and the couple has an emotional reunion over the phone. Following their safe extraction, it is assumed that Sato returns to Japan to his wife and his daughter.