There's been some recent events in Northeast Asia that are quite troubling. No, not the usual North Korea vs. South Korea business. It's much more complicated.
This is how I understand it, correct me if I'm wrong though:
First, the Senkaku Islands:
Japan claims that they were unclaimed when they found them in the late 19th centrury. The People's Republic of China (PRC) says otherwise. They were directly controlled by Japan starting in 1895, but lost them to the U.S. when World War II ended. In 1972, the U.S. returned them to Japan, which pissed off the PRC because they wanted the islands to be returned to them. And don't forget the Republic of China (Taiwan) which claims that because they are the REAL China that they should have the islands.
So since 1972, it's been a dispute but a mild one. Until... November 2013. In that month the PRC established the "East China Sea Air Defense Identification Zone" (ADIZ). In this zone, foreign aircraft traveling though this zone must report their flight plan to the PRC's Ministry to Foreign Affairs.
See those two small island areas just inside the zone? Those are the Senkaku Islands.
So now the PRC is exerting itself in the area against the Japanese.
A PRC frigate locked missiles on a Japanese destroyer and helicopter:
http://www.voanews.com/content/chinese-warship-locked-prefiring-radar-on-japanese-navy-tokyo/1597325.htmlBoth of them went to battle stations:
http://www.nation.com.pk/international/11-Feb-2013/stopping-short-of-warU.S. Intelligence has found that the PRC is moving ballistic missiles closer to the coast, near the Senkaku Islands:
http://freebeacon.com/beijing-war-prep/And as a result Japan has stepped up, promising to shoot down any PRC drones in the area... which the PRC says will be an
act of war.http://english.peopledaily.com.cn/90777/8438156.htmlOn top of all this... Japan and South Korea are ready to sign a military agreement. Not quite a pact, but the sharing of intelligence:
http://japandailypress.com/japan-ready-to-sign-south-korea-military-agreement-in-light-of-norths-aggressions-1727182/And in probably the most ridiculous development: The PRC and Republic of China are moving forward together with new high level talks, the first since 1949:
http://www.bbc.co.uk/news/world-asia-china-26129171Some varied viewpoints:
http://www.bbc.co.uk/news/world-asia-21290349So we have Japan and the PRC getting upset over a bunch of rocks, Taiwan (who also wants these rocks) moving toward the PRC, and South Korea moving toward with Japan on sharing military intelligence because of its own threat from... North Korea. And don't forget Japan and South Korea have their own alliance with the U.S.
It sounds messy.