If the Japanese are so clean, why is there so much crap on my beach?

Quick, what do these things have in common: thousands of plastic bottles (a few from far-off lands including Vietnam, China and South Korea, but 99 percent Japanese), hundreds of empty fishing-line packages, dozens of golf balls, a tennis racquet (stringless), a giant sea turtle (dead), a big skat

Source: http://www.japantimes.co.jp/community/2014/09/10/voices/japanese-clean-much-crap-beach/#.VBIDMsRmFIN.twitter