Saigo no Kizuna: Okinawa Hikisakareta Kyodai

This drama will be set after the Pacific War in Okinawa and is a documentary about siblings who tragically fight between each other as enemies as a part of both the Japanese and American armies. Sato will play a young man who enlisted as a part of "Tekketsu Kinnoutai", a war unit of young soldiers.
(Source: Tokyohive)