Why ten nuclear weapons would buy Japan only a temporary peace

Could Japan win World War II if it received ten 50-megaton nuclear warheads that could be deployed anywhere?

It might force a temporary peace, but could not secure a lasting victory once the weapons were found, spent, or matched by the United States.

The scenario gives Japan ten 50-megaton warheads and permission to deploy them anywhere, rather than a demonstrated means of delivering repeated nuclear strikes. Such a stockpile might compel a negotiated pause through threats. Maintaining control of weapons placed abroad would remain a problem, and an adversary could try to neutralize them. The proposed outcome is therefore temporary peace under coercion, possibly with concessions, rather than a secure end to the war. A future American nuclear capability would undermine the temporary advantage and leave the conflict unresolved.