It’s depressing thought, but we have to face the reality before proceeding to the future, right? Our ocean is contaminated by plastic garbage. At least in Japan these days, the direct damping of plastics intentionally to sea is becoming rare. Instead, trash on land, like candy wrappers casually thrown away, is swept by rainwater to a stream nearby, then floating down the river to the sea. Speaking “Forest is a lover of the Sea.” Heck. Yeah, it is true ecologically, but the humans around these two passionate lovers don’t care how the couple nurture their love … Nay, humans are caring. Not many people these days in Japan leave the garbage in forest or on road. If you do this, the city officers and sometimes police will come to see you … Still, many non-biodegradable things drift to the ocean.
| Seemingly impeccable beach |
And as you know, non-biodegradable does not mean a plastic bag keeps its form as a bag forever. UV light and the other many chemical reactions mutilate the mass of plastic into particles. Microplastics are born. Micro or nano, as substance plastics are plastics and do not decompose into a natural cycle. Moreover, they chemically react with the other toxins especially in ocean where salty water and UV light do a good job for creating another toxic material from trash. Worse, as they are tiny, even if they wash up the beach, they are too small to pick up during the standard beach combing. Period. Facing the reality part is over for this post. The next is, what to do?
| Too small to identify them here. |
Of course, the best way is to stop supplying the “raw material” for microplastics on land. Yeah. We Lovers of Niiharu engage in weekly forest patrol and collect garbage. The common item we find is PET bottles for drinks and candy wrappers. I don’t say ours is fruitless effort, but probably we need more knowing hands to deal with the problem. Why do I think so? Well, there is an apparent change in “trophies” we can have during the beach combing in Shonan Beach.
| Niiharu Lovers are patrolling. |
About 20 years ago, I helped beach clean to hold the Shonan Open Water Swim Race. At that time Shichiri-ga-hama 七里ガ浜 (; my post for March 9, 2025) had still certain amount of sand beach. We could set up the starting-point for swimmers of 5km race to Katase Higashi-hama 片瀬東浜 in front of Enoshima Island 江の島 (; my post for June 30, 2017). That Friday morning, a day before the race, we collected trash, like pieces of wood came down from Tanzawa Mountains 丹沢, debris of handheld fireworks (they are dangerous for barefoot swimmers), plastic wrappers for sweets and lunch packs, PET bottles, AND old TV, tyres, used syringe needles. We’re astonished to find a corner with needles, tyres, broken TVs, and called the City of Kamakura 鎌倉市 for help. Of course, we lamented the shameful morale of somebody who damped such things there. Now that I look back, it was good old simple days. Nowadays, when we beach clean, it is difficult to find old TV et al. Actually, finding PET bottles for drinks is not so frequent. The large “catch” could be some stray fishing tools probably fishermen gave up somewhere in the waters off. Hurrah for clean beach!? Nope. Instead, we meet sand with particles of strangely vivid pink, neon blue, and plastic green. The beach is covered with microplastics. Collecting these with tongs? You must be joking.
| Strange colors here and there. |
One sunny day this month, Kanagawa Environmental Research Centre organized a study session on how to scientifically monitor the microplastics contamination in our beach. The idea is simple. We gather plastic particles in a unit quadrant, 40cm*40cm, of sandy beach using trowels and sieves. We then count how many MP we find in that unit, measure a probably representative specimen, then analyze chemical characteristics of it with machines. Just gathering micro plastics is simply fun. These days kids, especially in elementary schools along the Shonan Beach, engage in the activity to experience the problem in their playing ground. Good. Knowing is the first step to solve the problem. We adults are required to think about it more. Let me continue about it next week.
If you find environmental issues in Kanagawa Prefecture, especially in cities and coastlines, please make contact with
Kanagawa Environmental Research Center 神奈川県環境科学センター
1-3-39 Shinomiya, Hiratsuka City, 254-0014
〒254-0014 平塚市四ノ宮1-3-39
Phone: 0463-24-3311
FAX: 0463-24-3300
https://www.pref.kanagawa.jp/docs/b4f/index.html

