Like Bltizo I'm not sure how the first video (post #3) show the Japanese coastguard vessel at fault. The trawler made a sharp port turn, causing the collision - you can see this because the wake.
This was the same scenario in one of the other videos, where the trawler hits a boat on the stern. As bladerunner said, if there had been no intention to do this the captain would have turned to the starboard (the logical and right thing to do per standard practice).
But the videos show that the trawler made two port turns on separate occasions, hitting the same ship or two different ones. Why did it do this if there was no intention to cause a collision?
Are you seriously suggesting that a Chinese fishing trawler chased down 2 Japanese naval vessels and rammed them? That would never happen unless the Japanese wanted it to happen.