China-Japan Security Pulse

Japan–US BMD/missile acceleration and China's nuclear threat

Japan–US BMD/missile acceleration and China's nuclear threat

Key Questions

What steps is Japan taking to accelerate its missile and defense capabilities?

Japan deployed Type 12 anti-ship missiles to Minamitorishima and is developing attack-capable unmanned submarines. It also proposed a 'new defense concept' to package military expansion.

How is Japan expanding its international defense cooperation?

The Defense Ministry plans a new bureau-level unit for international defense cooperation, the first reorganization since 2007. Japan is posting JSDF officers to NATO's NSATU and pushing 'security indivisibility' with NATO.

What exercises has Japan conducted recently?

Japan participated in three major exercises including Valiant Shield, where a JMSDF submarine sank the former USS Juneau in a SINKEX. It also joined 'Stacked Action' drills focused on mid-range missile deployment.

What did retired JGSDF officers say about Japan's defense posture?

Lt Gen Yano's simulation indicated Japan could last only one week in a conflict with China. Lt Gen Isobe called for deeper integration with the US and Australia.

How is Japan framing its remilitarization diplomatically?

Japan is using proactive diplomacy and softer language such as 'new defense concept' to present military expansion as alliance burden-sharing rather than independent rearmament.

What unmanned systems is Japan developing?

CCTV reported Japan is accelerating development of unmanned combat systems, including attack-capable unmanned submarines for offensive operations.

What US exercises support allied missile deployment in the region?

The US 'Stacked Action' series includes arming allies with mid-range missiles and 53 joint drills aimed at countering regional threats.

How does Japan view its role within the US alliance?

Analysts describe Japan's posture as assuming greater responsibility through 'alliance re-division of labor' rather than signaling US withdrawal from the region.

Japan accelerating remilitarization with three exercises, Minamitorishima missile deployment, and unmanned submarine development; experts note offensive shift. Japan submarine sank former USS Juneau in Valiant Shield SINKEX. US 'Stacked Action' exercises include arming allies with mid-range missiles. Japan deployed 12-type anti-ship missiles to Minamitorishima. Retired JGSDF Lt Gen Isobe emphasized need for deeper US-Australia-Japan integration. Japan's proactive diplomacy reframed as alliance re-division of labor. CCTV reports Japan accelerating unmanned combat systems. Retired JGSDF Lt Gen Yano's simulation that Japan could only last one week. Japan-NATO defense cooperation progressing with JSDF officer posted to NSATU. New: Japan government proposed 'new defense concept' to package military expansion under softer language. Defense Ministry plans to establish new bureau-level unit for international defense cooperation, first such reorganization since 2007. Japan pushing 'security indivisibility' with NATO to internationalize its defense posture. Japan developing attack-capable unmanned submarines.

Sources (16)
Updated Jul 7, 2026