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November 2025

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2025年11月3日 / Last updated : 2025年11月3日 桑子 研 Science

When You Shift to an Easier Gear on a Hill, You’re Doing Physics! The Bicycle and the Principle of Work

Ken Kuwako, Science Trainer. Every Day is an Experiment. You’re panting, struggling up a steep hill. Just as you think, “I can’t do this anymore…,” you click the left-hand lever. Click! Suddenly, the desperate, heavy drag on the pedal disappears like magic! Many of you have probably been saved by this “magic,” right?But have you […]

2025年11月3日 / Last updated : 2025年11月3日 桑子 研 Science

Forget Textbooks: How a Schoolyard Walk Becomes a Real-Life Biology Treasure Hunt

I’m Ken Kuwako, a Science Trainer, and for me, every day is an experiment. What comes to mind when you hear the phrase “studying science”? Maybe it’s thick textbooks, complicated jargon, and endless memorization. But what if your very first science lesson was a treasure hunt? Wouldn’t that get you excited? In reality, the area […]

2025年11月3日 / Last updated : 2025年11月3日 桑子 研 Science

Gennai Hiraga: The Edo-Era Wizard Who Shocked Japan with the “Elekiter”

I’m Ken Kuwako, a Science Trainer. Every day is an experiment! Have you ever heard the word “Elekiter”? The Elekiter was the very first full-scale “static electricity generator” to be officially introduced to Japan. 【Listen to this article on the radio here】 Quoted from “Biography of Gennai Hiraga” (Shueisha) The man who repaired and restored […]

2025年11月2日 / Last updated : 2025年11月2日 桑子 研 Science

Making the Invisible Visible! Discover the Secrets of Air Pressure with a Vacuum Chamber (Using a Bread Case!)

I’m Ken Kuwako, a Science Trainer. Every day is an experiment. Have you ever heard the story about a bag of potato chips puffing up and almost bursting when you take it up a high mountain? This phenomenon is actually the work of “the power of air (Atmospheric Pressure)”, a force we completely ignore in […]

2025年11月2日 / Last updated : 2025年11月2日 桑子 研 Science

Electric Current’s True Identity: A Visual Guide to Cathode Rays (A Must-See Crookes Tube Experiment!)

I’m Ken Kuwako, a Science Trainer. Every day is an experiment. Which Way Does Current Flow? Chasing Electron Beams with a Crookes Tube! The topic of “current direction” taught in middle school science is surprisingly deep and fascinating once you start talking about it. Your textbook says that “electric current flows from the positive (+) […]

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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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