Japan’s Most Dangerous Military Constraint Is Time

AI Summary

A 2022 U.S.-Japan wargame exposed a timing problem in Japan’s rules for emergency military access to private land: planners believed access could be granted only after an attack, too late for forces to disperse. One participant identified a possible earlier cabinet option, highlighting how assumptions about legal authority can shape alliance contingency planning.

During a 2022 wargame I ran, bilateral planners reached a familiar barrier. U.S. forces needed to disperse from concentrated bases before the adversary’s first missile salvo. Participants believed Japan could grant emergency access to private land only after an attack, which would be too late — the authority’s trigger was also its deadline.This appeared to be a hard political constraint: the kind alliance planners record in after-action reports, script into next year’s exercise, and then carry, untested, into contingency plans, where assumptions harden into fact. But in 2022 one participant read the law differently, identifying an earlier cabinet option every The post Japan’s Most Dangerous Military Constraint Is Time appeared first on War on the Rocks.