Premise: Warrant Officer Kenji Yanagiya (柳谷 謙治 , Yanagiya Kenji , March 1919 – February 29, 2008) was a member of the Imperial Japanese Navy's Zero fighter aces who fought the Battle of Solomon Islands in October 1942 – June 1943. He is best known as the only escort fighter pilot of the Yamamoto mission to survive the war.
Hypothesis: Kenji Yanagiya was between 23 and 24 years old when he fought in the battle of the Solomon Islands.