Since Prime Minister Takaichi Sanae’s Liberal Democratic Party secured 316 seats in Japan’s Lower House, the largest majority seen since the end of World War II, constitutional revision has now returned to the political agenda. Article 9 — the pacifist clause that has shaped debates about Japan’s security posture since 1945 — may finally be rewritten to acknowledge something that has long been obvious in practice: Japan already operates a military under another name.

That would be a mistake.

It’s not that constitutional revision would suddenly threaten Japan’s peace or stability, although claims along those lines are sure to be seized upon and amplified by Beijing. The deeper problem is that the entire debate rests on a misreading of what Article 9 has actually done in practice. The conventional narrative frames the clause as an occupation-era restriction that Japan must remove before it can respond effectively to the security pressures emerging in its region. That description no longer quite matches operational reality.

Over time, Tokyo has interpreted Article 9 in ways that stretch well beyond its original intent. The Self-Defense Forces (SDF) now operate as a modern military institution in capability if not in constitutional designation. The 2014 reinterpretation widened the scope for collective self-defense, allowing Japan to assist allied forces under defined contingencies. Defense spending has continued to rise toward the 2% of gross domestic product benchmark, while procurement decisions are now reaching into areas once considered off-limits, including long-range strike capabilities such as Tomahawk cruise missiles.

None of these developments required altering the constitutional text itself.

Text versus the reality

The distance between constitutional language and security practice is not a mistake that needs correcting. It has been the mechanism that allowed change to occur without political rupture. Ambiguity created space for capability development without forcing a definitive break with Japan’s pacifist identity. Formal revision would close that space in exchange for symbolic clarity that satisfies some domestic constituencies while narrowing Japan’s strategic flexibility.

The SDF functions as a military in everything but constitutional designation. Their helicopter destroyers operate F-35s. Long-range strike weapons have entered procurement planning. Japan fields one of the most capable naval forces........

© The Japan Times