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December 2025

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2025年12月3日 / Last updated : 2025年12月3日 桑子 研 Science

The Half-Height Secret: The Physics Trick That Lets Any Mirror Reflect Your Entire Body

Unlocking the Mirror Mystery: Why Half Your Height Is All You Need I’m Kuwako Ken, your Science Trainer. Every day is an experiment. When you head to the furniture store looking for a full-length mirror for your fashion check, do you find yourself searching for one that’s exactly the same height as you? Here’s a […]

2025年12月3日 / Last updated : 2025年12月3日 桑子 研 Science

Trace the “Footprints” of an Earthquake! Discover Hidden Secrets with Isoseismal Maps on a Blank Chart

I’m Ken Kuwako, your Science Trainer. Every day is an experiment. You may have heard the phrase, “An earthquake is a living entity.” How does a phenomenon that occurs deep underground travel and manifest on the surface? We held a lesson designed to visualize the “footprints of an earthquake,” something you can’t grasp just by […]

2025年12月2日 / Last updated : 2025年12月3日 桑子 研 Science

A Science Teacher’s Secret to Winning Daruma-Otoshi: Master It with Newtonian Physics!

I’m Ken Kuwako, your Science Trainer. Every day is an experiment. The Daruma Otoshi is a traditional Japanese folk toy, beloved by many. But did you know that it’s also a surprisingly perfect teaching tool for demonstrating the Law of Inertia that you learn in science class? While it’s often cited as a textbook example, […]

2025年12月1日 / Last updated : 2025年12月1日 桑子 研 Science

Tug-of-War Titan: The Mini 4WD Secret to Mastering Friction (and Why Heavier Always Wins!)

I’m Ken Kuwako, Science Trainer. Every day is an experiment. Science Experiments with Wild Mini 4WD Cars Have you ever heard of Tamiya’s “Wild Mini 4WD”? The standard Mini 4WD is a sleek machine built for speed, but the Wild version is a rugged powerhouse. It has tires two to three times larger than the […]

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運営: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。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
My mission is to share the joy, wonder, and excitement of science with as many people as possible. As a Science Trainer, I stay busy supervising and appearing on science-themed TV programs, hosting hands-on experiment workshops, and authoring science books.

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