What the Japanese have observed is what I'm seeing too. China is using every tool in the shed to try to establish itself as a superpower at the expense of others.
China will use international platforms to berate others for things that they're happy to do themselves, regardless if others call them out on their hypocrisy. They'll cry to the UN when nations that they don't yet have great leverage over slaps them on the hand near their backyard, like when their dangerous ships get confiscated.
They are pouring money into developing nations like Pakistan, Malaysia, Vietnam, and have been trying to do the same with many other Southeast Asian countries, while simultaneously getting in a conflicts with them over the South China Sea. This seems contradicting, but my take is that their goal is to secure their trade route from being blockaded in case of a more heated conflict, e.g. a war. They may be building out roads and highways in their Belt & Road Initiative, but maritime trade is still the most cost-effective option, and it would be terrible to be cut off from that, or if they need to make large detours.
Coming back on topic, I don't like the fact that there are nations with more saying at any given international platform, be it the US, China, or Japan, be it because of whatever reason. But it also says something about these platforms, either that they haven't scrutized themselves sufficiently, or that even Japan have come to think that the UN has failed in its non-partisaness that they're taking matters into their own hands.
This timeline sucks.