To start things off, US President Obama is visiting East Asia this week, and there's a lot on his plate.
A big part of his visit is to convince American allies in the region that the much-touted "strategic pivot to Asia" is actually....y'know, pivoting. Cause after that announcement, the US really hasn't done jack-shit in the region because Syria, Iran, Ukraine, etc.
In the meantime, you have:
1. China claiming airspace jurisdiction well beyond their previous borders, out into the East China Sea
2. Territorial disputes over the Diaoyu/Senkaku islands and the South Spratleys
3. The launch of the
Liaoning, China's first aircraft carrier (basically the old Soviet
Varyag hull stripped down and rebuilt with Chinese gear).
4. A successful and rapidly advancing Chinese space program.
5. A new Chinese President (Xi Jinping).
6. An escalating "cyberwar" between China and the US. While Chinese hackers are said to have penetrated a number of US systems, including military networks, you also have Edward Snowden claiming that the NSA has been hacking Chinese systems, including Huawei -- the single largest networking gear firm in China, and provider of most of the routers/switches etc. in use in the PRC (and many other countries).
7. Two high-profile transportation disasters (the Malaysian Air crash and the capsized ferry in South Korea).
In Japan-China-Korea relations, you have the annual Yasukuni "war shrine" dog-and-pony show where conservative Japanese politicians go to make an annual remembrance of WWII war dead (including about 1600 convicted war criminals). This triggers outrage among Chinese and Koreans, who were largely the targets of much of that Japanese war crime. For a few years there, the Japanese PMs stopped going. But this past December, PM Shinzo Abe visited Yasukuni, triggering the expected reaction overseas. Interestingly,
only 38% of Japanese approved of the visit. But at the same time, over 60% said they were unconvinced by the criticism of the visit. (Which kind of sums up *my* feelings on it as well. The visits themselves make me roll my eyes, but so do the yearly histrionics over it.)