Japan Defense Spending

Japan's defense budget funds the Self-Defense Forces alongside host-nation support payments that help cover the cost of US forces stationed in Japan—a cost-sharing arrangement tied to the two countries' security alliance rather than spending on a stand-alone national force.

Japan's 2022 National Security Strategy committed to roughly doubling defense spending to about 2% of GDP by 2027, a sharp break from the informal 1%-of-GDP ceiling the country had generally held to for decades after World War II, driven by concerns over regional security dynamics and including, for the first time, a “counterstrike” missile capability.

A weaker yen against the dollar in recent years has compressed Japan's dollar-denominated total even in years when yen-denominated spending rose, so exchange-rate movement alone can shift Japan's position in global rankings without any change in domestic budget authorization.

Japan's Ministry of Defense publishes annual budget outlines in English, and SIPRI documents its yen-to-dollar conversion methodology for those who want to verify the figures directly. Compare with China Defense Spending for the regional dynamic often cited behind Japan's buildup, or with Global Military Spending for Japan's share of the world total.