Japan Defence Minister Shinjiro Koizumi Calls for Military Expansion, Constitutional Revision
Japan must "strengthen its defence capabilities" and reconsider its pacifist stance, Defence Minister Shinjiro Koizumi stated, advocating for a revision of the constitution to adapt to regional security dynamics. He argued that reinforcing alliances with the United States and expanding collaboration with other nations are "critical for ensuring that no new war breaks out in this region."
Recent policy changes have seen Japan relaxing arms export rules, allowing the sale of defence equipment and lethal weapons to 17 countries, including the US and UK. Koizumi cited interest from Australia, the Philippines, Indonesia, and New Zealand in acquiring Japanese defence assets, marking an "unprecedented" shift in Indo-Pacific defence trade.
Constitutional Amendment and Regional Tensions
Prime Minister Sanae Takaichi, in office since October 2025, has advocated for amending Article 9 of Japan's constitution, which renounces war and prohibits the maintenance of military forces. Koizumi supports this, citing the dramatically altered security environment over the past eight decades. Critics, however, argue that such amendments are more a "political agenda than something based on military rationality," suggesting current constitutional provisions are sufficient for defensive operations.
China's military expansion and North Korea's ballistic missile tests are frequently cited by Tokyo as necessitating this strategic re-evaluation. Japan's Defence Ministry has designated China's military activities as the "greatest strategic challenge." Despite this, Koizumi maintained Japan's openness to dialogue with Beijing, even as direct communication opportunities remain scarce.
Japan's defence budget has doubled to 2% of GDP under Takaichi's administration, earmarked for new surface-to-ship missiles and unmanned drones. This move aligns with US pressure for allies to increase their defence spending, as articulated by US Defence Secretary Pete Hegseth, who declared, "The era of the United States subsidising the defence of wealthy nations is over."
The push for constitutional revision and increased military spending has prompted significant anti-war protests in Japan, highlighting domestic opposition to a departure from the nation's post-war pacifism. While the ruling Liberal Democratic Party champions these changes, Koizumi acknowledged that any amendment ultimately requires a national referendum.
