The annual global outflow of marine plastic waste is estimated to be 8 million tons (Jambeck Research Group 2015). It is estimated that over 8.3 billion tons of plastics have been produced since 1950, of which the cumulative amount discharged into the ocean to date has reached 150 million tons (McKinsey & Company 2015).
If this situation continues, the weight of the world's marine plastic litter is expected to exceed the dry weight of all marine life in all the Ocean by 2050 (World Economic Forum 2016）．
As of 2014, the “live body weight:plastic litter” ratio is still at the “5:1” level

And focus on Japan, the situation is harder surrounded by many growing Asian countries.
82% of all plastic waste now comes from Asian countries (World Economic Forum 2016), that cause a major marine litter problem in Japan

China is the largest emitter of marine plastic waste in the world. This plastic debris is carried by ocean currents and first washes ashore in Taiwan and Japan. In Japan, this brings  a big problem.

Since the westerlies blow from west to east, this garbage drifts to the west side of Japan.
Since the population on the west side of Japan is relatively very small, many Japanese people are not aware of this problem. But Japan has the worst levels of marine debris drifting pollution in the world.

If not collected in Japan, such drifted garbage will be carried by the North Pacific Current and reach the coast of California. Then, it travels further south and creates a large garbage pile near Hawaii.
From there, the garbage will spread to the rest of the world on the South Pacific Current in the opposite direction.
Most of the garbage goes directly to the south of Japan, where it forms another garbage pile.
In this way, marine plastic waste is circulated and crushed into small pieces on both coasts of Japan and the United States.

Many of the micro-plastics we see on the Pacific coast come from these long journey.
Therefore the first pick-up point of marine plastic waste is Japan. We needs to act collecting marine plastic garbage here in Japan immediately.

What will happen if the amount of marine plastic waste continues to increase without being collected?
The shredded micro-plastics are mistaken for food and preyed upon by small fish and seabirds. Since plastic tends to adsorb many chemicals while drifting, predation on micro-plastics can lead to fish pollution.
There is particular concern about the accumulation of pollution in large fish such as tuna, which exist at the top of the food chain.
In fact, a study (Gall & Thompson 2015) found that 90% of the marine life that has already died has some form of marine plastic debris in it.

There is a high possibility that our bodies, which eat tuna, will eventually become contaminated with chemicals. If this trend continues, the future of not being able to eat fish may become a reality.