North Korea's Missile Programme: Japan, South Korea and the US Strengthen Military Cooperation

North Korea's expanding missile programme continues to create serious security concerns across East Asia.

Pyongyang has consistently developed its ballistic missile and nuclear capabilities despite international sanctions and diplomatic pressure.

On October 3, 2026, North Korea launched a ballistic missile towards the sea off its eastern coast, according to South Korean and Japanese authorities.

The missile was launched from the Wonsan area. South Korea immediately increased military monitoring, while Japan issued maritime safety warnings.

The launch came amid already deteriorating relations between North Korea and South Korea.

North Korea has increasingly rejected the idea of peaceful reunification and has described South Korea as its principal enemy.

An additional source of tension has been an incident involving landmines in the Korean Demilitarised Zone, which seriously injured two South Korean soldiers.

North Korea rejected South Korea's demand for an apology.

In response to these developments, South Korea, Japan and the United States have strengthened their security coordination.

On October 9, senior defence officials from Japan and South Korea held discussions in Tokyo and reaffirmed the importance of cooperation against North Korean nuclear and missile threats.

The countries are also discussing cooperation in advanced military technologies, including artificial intelligence and unmanned systems.

Geopolitical significance:

• North Korea's missile capabilities threaten regional security.
• Japan and South Korea are increasing military cooperation despite historical disagreements.
• The United States remains central to the regional security arrangement.
• North Korea's relationship with Russia and China is strategically important.
• Missile defence, surveillance and artificial intelligence will increasingly shape East Asian military planning.

The major concern is whether continued military demonstrations will eventually lead to a serious confrontation on the Korean Peninsula.