Japan

National in-service fixed-wing aircraft classified as Combat aircraft by FlightGlobal/Cirium, summing the Active column across all military services listed for the country. Excludes the separately classified trainers, special-mission aircraft, tankers and helicopters, as well as aircraft in storage, undergoing or awaiting upgrades, and orders. This is the directory's active-role inventory estimate, not a measure of combat readiness.

National in-service fixed-wing military transport aircraft classified as Transport by FlightGlobal/Cirium, summing the Active column across all military services listed for the country. Includes strategic, tactical and light liaison/utility transport aircraft; excludes the separately classified trainers, special-mission aircraft, tankers and helicopters, as well as aircraft in storage, undergoing or awaiting upgrades, and orders. This is the directory's active-role inventory estimate, not a measure of immediate availability.

2020 annual observation. Active-duty military personnel, including qualifying paramilitary forces; not an active-regular-only count.

Actual appointed SDF reserve membership on 31 March 2026: 32,267 regular reservists plus 3,805 ready reservists. Excludes 3,499 reserve candidates still undergoing initial training (予備自衛官補), the general military-eligible population and authorized unfilled reserve positions.

Japanese Maritime Self-Defense Force submarines commissioned into service at 31 March 2025. Excludes orders; not a readiness count.