The Japanese military is severely limited by their constition, see JapanConstitution/ChapterTwo.
Military branches: Japan Ground Self-Defense Force (Army), Japan Maritime Self-Defense Force (Navy), Japan Air Self-Defense Force (Air Force)
Military manpower - military age: 18 years of age
Military manpower - availability: males age 15-49: 30,259,247 (2000 est.)
Military manpower - fit for military service: males age 15-49: 26,139,516 (2000 est.)
Military manpower - reaching military age annually: males: 771,452 (2000 est.)
Military expenditures - dollar figure: $42.9 billion (FY98/99)
Military expenditures - percent of GDP: 0.9% (FY98/99)