The Chinese government has long sought to break up the US-ROK and US-Japan military alliances that maintains the current security framework in Northeast Asia. The THAAD issue is a perfect example of how they have created tension in the US-ROK alliance with disinformation. The comfort women issue is another issue that Beijing has weaponized to create tension between the US, Korea, and Japan:
The “comfort women” issue appears, on the surface, to be a bilateral problem between South Korea and Japan. In reality, it is deeper. The key player is increasingly not South Korea, but China, and the ultimate target is not Japan, but the United States, as the comfort women are co-opted by Beijing in its anti-American information war.
China has been waging this war since Beijing realized after the First Gulf War that it would likely be unable to the United States on the battlefield. As the document Unrestricted Warfare, published by two high-ranking Chinese military officials, makes clear, the Chinese have chosen to fight the US, and particularly the US-Japan alliance, using desinformatsiya rather than hardware and troops. (…)
Overseas Chinese groups have also pressed hard on the comfort women and Nanjing issues in the US and Canada: In San Francisco, Superior Court judges Julie Tang and Lillian Sing retired from the bench in order to co-found the Comfort Women Justice Coalition, which was ultimately successful in bringing a comfort woman statue to San Francisco. Chinese-American San Francisco Mayor Ed Lee was himself a vocal proponent of the comfort woman statue. [Asia Times]
You can read more at the link, but I would not be surprised if Beijing isn’t fanning the flames of the anti-base sentiment in Okinawa as well to create further tension between the US and Japan.