The military to military political exchanges with NATO, the US or any other nation (such as Russia) can have a negative impact on a nation's political power though. It does improve Japan's standing with its friends, offers new opportunities to train or acquire military arms or enter into defense and intelligence agreements, but the effects are not positive alone and this is why I don't consider Japan's political dealings to be one of its strengths. Now I'm not one of those that believes, and wrongly so, that the US dominates Japans political dealings, but by dealing with other powers, Japan dilutes its own political power. The more powers you have involved in any given project, such as NATO, the less noticeable individual voices become. NATO for all intents and purposes is an extension of the US military given the US's large role and all other voices tend to follow the US or are overpowered or bullied by the US. Japan has its own foreign policy, but its not global enough or persuasive enough to make it a superpower. It's a power, one that has built up relations with regional nations very nicely, but not always unilaterally. Japan's friendships with some nations are as much a testament to the US's own persuasive powers as their are Japan's ability and need to reach out to South Korea or Australia. Japan is strong politically, in its region of the world, but not globally. It's military is making many welcomed (from a US perspective) strides and will continue to make them as its region remains a tinderbox awaiting a spark. Japan doesn't need to spend more money, just spend it better on its military (reduce the size and equipment of the JGSDF and use the money to bolster the JMSDF and EW arms). Economically Japan needs work urgently, thought the sky isn't falling. Japan still has leverage in this sector and its reputation has earned it not only prestige, but also contracts in places such as India with their border road project. Culturally is where Japan's power lies. Even in China, friendly, but not the most pro-Japan nation on this planet, cultural saturation of Japanese goods, services and entertainment is a force to be reckoned with.