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December 2025

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2025年12月8日 / Last updated : 2025年12月8日 桑子 研 Science

The 100-Yen Toy That Makes Invisible Sound and Earthquakes Visible

Science Trainer, Ken Kuwako. Every Day is an Experiment. Have you ever actually seen sound? Of course, sound itself is invisible. However, in science classes, we put a lot of effort into finding ways to make this unseen world of sound “visible.” This time, I’d like to introduce a surprising secret weapon that plays a […]

2025年12月7日 / Last updated : 2025年12月7日 桑子 研 Science

Lift It with Just One Chopstick!? The Science Magic of Rice and a Plastic Bottle (Unleashing the Power of Friction!)

I’m Ken Kuwako, your Science Trainer. Every day is an experiment. Would you believe me if I told you that you could lift a heavy plastic bottle packed solid with rice using just a single pair of chopsticks? You might think, “No way, that’s impossible!” But with just a “small trick,” you can make it […]

2025年12月6日 / Last updated : 2025年12月6日 桑子 研 Science

Capturing the Winter’s Giant Full Moon with the Smart Telescope “Seestar” — When the Cold Moon Meets the Supermoon

I’m Ken Kuwako, your science trainer. Every day is an experiment. The season has arrived when our breath turns white and the stars shine with an even sharper intensity. If you happen to glance up at the night sky, don’t you notice the moon glowing with an overwhelming presence? Actually, the Full Moon gracing the […]

2025年12月5日 / Last updated : 2025年12月5日 桑子 研 Science

Giant Salmon Roe or Tarako?! Make Your Own Mysterious “Water Ball” You Can Hold!

Science Trainer Ken Kuwako: Where Every Day is an Experiment. Have you ever tried holding water directly in your hands? Yesterday, my science club students and I whipped up these jiggly “Water Balls.” They look like drinking water from a futuristic sci-fi movie, but this is actually a chemistry experiment using very common ingredients. While […]

2025年12月4日 / Last updated : 2025年12月4日 桑子 研 Science

Held Up Without Glue! The Magic of Friction from Just Two Toothbrushes

I’m Ken Kuwako, a Science Trainer. Every day is an experiment! Can you imagine a toothbrush suddenly transforming into a heavy-lifting powerhouse? We’re going to show you an experiment where a simple tool, usually just for cleaning teeth, unleashes astonishing power through the magic of science. It’s a perfect, everyday trick to experience the fun […]

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運営者:桑子研(くわこ けん)
科学の楽しさや不思議、感動を多くの人に届けていきたい。理科教師として勤務する傍ら、サイエンストレーナーとしてテレビ番組の科学監修・出演、実験教室、科学本執筆なども行っています。

Author: Ken Kuwako
I want to share the fun, wonder, and excitement of science with as many people as possible. In addition to my work as a science teacher, I also work as a "Science Trainer," providing scientific supervision for and appearing on TV programs, holding hands-on science workshops, and writing science books.

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