"How dare you, aru!"

"Look, your ship crashed into mine on my territory, so I have every right to-"

"It's not your territory, aru! Those islands are in the East China Sea!"

"No, they're on the border of it, which more or less makes them my islands, since they're closer to Kyushu."

"They're my Diaoyutai!"

"No, they're my Senkaku."

...And this little argument continues still... *sigh*

So, Japan arrested the people on the Chinese merchant ship. They soon returned the sailors, but it took awhile to get them to free the captain...