http://en.wikipedia.org/wiki/Senkaku_Islands_dispute
this actually already been debated since end of WW2. the idea being that japan capture the island at WW2. when japan lose they must give back land that they capture to china. the question weather this island is part of agreement?
it was bit calm down until recent news where japan gov decide to buy the island
http://www.theaustralian.com.au/news...-1226465696624
of course china would not let this happend so they send the patrol. and then japan, then taiwan.
well so far the sea is calm.
the ground on other hand...
... Chinese people destroying japan stuff in china.
apparently it spreading to 80 city or so
more pic
http://imgur.com/a/Y7oIp/all