I demand Japan be following the footsteps of Germany and be more generous in its 'tangible' efforts to protect those countries upon whom it had once inflicted unimaginable mass destruction. We need no more presidential apologies or piddly $30 million economic aid for 10 years in exchange for busting our ass in Vietnam with far more expenses, we want access to and convenient R&D opportunities for world-class stealth technology! See what helps more in preventing East Asian history from repeating itself?
Korean military technology cannot catch up to the Russo-Chinese technology of China on its own. Korea needs the help of China's other great rivals. Korea receives response from the US, Europe, Southeast Asia, and even from Russia itself, but Japan doesn't seem to care to respond, at least not in a way Korea can meaningfully perceive it. Japan could add Korea to their exception list of to whom it could export military technology, but it didn't. If Japan only have enough willingness to do it, Japan can do it. If the Japanese people then somehow objected to the government's legitimate and rational decision to help Korea via means of military technology, then it would only show that the Japanese people were actually being insincere and superficial about their wishes for healthy and effective camaraderie and alliance with Korea. I'm still convincing myself that that is not true, that Japanese people still have only the best wishes for Korea's continued era of relative peace and prosperity. The honorable Japanese people will support Japan's amendment of its policies on technology transfer to accept Korea as a legal beneficiary of joint projects in military R&D, so citing possible civil unrest for describing the reason for refusing military co-development with a key strategic ally is not a convincing excuse.
Japan can help Korea militarily at a much higher level than it does now, by more than serving as mere way-points for US forces. Japan should start using that potential more often, and maybe the future Koreans will like Japan more than Koreans do today. Apologies are still mere words at their inception; they should be followed up by tangible actions which speak volumes of what they mean.