Listen carefully, and you can hear a slow crescendo among security specialists calling for Japan’s inclusion in the “Five Eyes” intelligence alliance. Membership makes some sense given this country’s needs and what it can contribute. Two obstacles loom large, however, and while not insuperable, they are formidable.

Membership would be a coup for Tokyo, a declaration of confidence in Japan’s ability to protect information, but joining the exclusive group is no panacea. It will not solve the most important security challenges the country faces.

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