Original Article
Rough Translation:
Yamapi was in Korea for a private and short trip with his friend(Shirota Jun) and manager(first guy in the video) Hours before his departure from Gimpo Airport, the news was leaked all over the internet and more then 1000 fans showed up. According to news, the airport didn't have enough security and Yamapi got mobbed by fans. He got his shirt torn and someone threw a gift at him and it hit his head.
EDIT: added by quin_tessen_ce: The article says apparently the Jimusho said that his hair was pulled out and he got some injuries on his body... But YamaPi keeps saying it's alright, but he was shocked. Apparently everyone[Security?] started to swear at the fans, Yamapi didn't. And even through the hectic chaos he tried to show his professionalism, by waving at some of the fans and even helping a fan who fell down to get up.(if you look at the bottom 3 caps he's pulling on someone, I wonder if it's the fan who he helped to get up. awww, that's so sweet of him)
Korean netizens are expressing their apologies and saying how disappointed & embarrassed they are with the fans' behaviors and they are aware that things crossed the line yesterday.

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Holy crap.
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And they call themself a "fan"? A real fan NEVER harass' her/his idol!
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I hope he was able to enjoy his little vacation with Yuu, though, how cute!
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*feels upset*
din know they pulled his hair and tore his shirt???
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I hope they didn't get injured too much..
this is insane, unbelievable..
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Hope he's fine. ^^
He most likely won't be going back there soon. >_< Which is really sad.
Korean should learn to respect jIdols a bit better and stay at least 3 meters from each person. >_
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Word spreads hecka quick in Korea. O____O
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luckily, yamapi doesn't have to deal with the elves.
ilu crazy korean fans. ♥
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<3
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(I'm not talking to you, guys...just to stupid fangirls/boys as them X.x)
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And I hope the Korean fans enjoyed seeing Pi cause he probably won't go back to Korea for a looooong time. :\ I know I wouldn't...
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i hope he is alright,,
they're really scary!!
poor Pi..
they shouldn't have done that..
and to think he cho0se korea to have his short vacation..
the fan girls were mean..
Happy 23rd Birthday YamaPi..^__^
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But really, I don't think those are fans, those are some weird not-human beings!
I even heard he lost his bag with his important and personal stuff in it. Probably stolen.
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