18-25 years of age for male compulsory and voluntary military service; females may volunteer for active duty military service; conscription typically takes place twice annually and service obligation is 18 months (Army, Air Defense), 2 years (Navy and Air Force); 18-45 years of age (male) or 18-40 years of age (female) for Militia Force or Self Defense Force service; males may enroll in military schools at age 17.
19-45 years of age for compulsory military service; during wartime the law allows for recruitment beginning January of the year of inductee's 18th birthday, thus including 17 year olds; 18 years of age for volunteers; conscript service obligation is 1 year for the Army and 9 months for the Air Force and Navy; women are eligible for voluntary military service.
