Japan was clearly marginalized in the run-up to and during the June 12 summit between the U.S. and North Korean leaders in Singapore. The dynamics suggest that Tokyo will not play any significant role in the follow-up negotiations.
There is no way to obfuscate these hard facts with any political or diplomatic sleight of hand. President Donald Trump promised Prime Minister Shinzo Abe that Japanese interests in the region would not be ignored. Such interests were possibly mentioned in the Trump-Kim dialogue. But if so, with what degree of priority or weight?