He graduated from the 24th class of the Army Staff College in 1912 .
A native of Aichi Prefecture , Sakai graduated from the 18th class of the Imperial Japanese Army Academy in 1905 , and was commissioned into the Imperial Guard 's 4th Infantry Regiment .
Sakai graduated from the 24th class of the Army Staff College in 1912 .
A native of Aichi Prefecture , Sakai graduated from the 18th class of the Imperial Japanese Army Academy in 1905 , and was commissioned into the Imperial Guard 's 4th Infantry Regiment .