Hiroo Onoda – Wikipedia

Hiroo Onoda (Japanese: 小野田 寛郎, Hepburn: Onoda Hiroo, 19 March 1922 – 16 January 2014) was an Imperial Japanese Army intelligence officer who fought in World War II and was a Japanese holdout who did not surrender at the war’s end in August 1945. After the war ended Onoda spent 29 years hiding in the Philippines until his former commander travelled from Japan to formally relieve him from duty by order of Emperor Shōwa in 1974.

https://en.wikipedia.org/wiki/Hiroo_Onoda