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2025年9月21日 / Last updated : 2025年9月21日 桑子 研 Science

Why Do Bananas Look Yellow? Unveiling the Secrets of Light and Diffuse Reflection at Home

I’m Ken Kuwako, a science trainer. Every day is an experiment! You can see your face clearly when you look in a mirror, but when you look at the desk or wall in front of you, nothing is reflected back… Ever wondered why? 🤔 The secret to how we “see” the world isn’t a mirror’s […]

2025年9月21日 / Last updated : 2025年9月21日 桑子 研 Science

How to Dilute Hydrochloric Acid, Sulfuric Acid, Ammonia, and Copper Chloride: Master the Basics of Dilution for Safe Lab Prep!

I’m Ken Kuwako, a science trainer. For me, every day is an experiment. 【Read this article in English】 When handling chemicals in the science lab, a solid understanding of dilution is essential for conducting experiments “safely, accurately, and efficiently.” In this guide, I’ve put together key dilution methods, safety protocols, and practical concentration levels for […]

2025年9月20日 / Last updated : 2025年9月20日 桑子 研 Science

Science at the Dinner Table! Pop! Is Sprinkling Salt Really the Same as the “Daruma Otoshi” Trick? (Law of Inertia)

The Law of Inertia Hiding in Your Kitchen The law of inertia, which is so seamlessly integrated into our daily lives, can be found right in the kitchen. It’s that simple act of sprinkling salt! When you’re cooking, you rhythmically shake salt or pepper onto your food, right? That seemingly simple motion is actually a […]

2025年9月20日 / Last updated : 2025年9月20日 桑子 研 Science

Struggling with Those Scissors? Rethink Your Tools with the Science of Levers and Work!

I’m Ken Kuwako, a science trainer. Every day is an experiment! Hello everyone! Do you ever just grab a pair of scissors or pliers from your drawer and use them without thinking? What if knowing the hidden rules of force behind these tools could make your daily life smarter and more fun? The truth is, […]

2025年9月20日 / Last updated : 2025年9月20日 桑子 研 Science

Too Late Once You See It! Learn the Secret of the ‘0.2-Second Wall’ with the Banknote Catch Challenge (Reaction Speed)

Hi, I’m Ken Kuwako, your Science Trainer. Every day is an experiment! Imagine a 1000-yen bill fluttering right in front of you. What if you could snatch it with your fingers? If you could, it’s yours! Wouldn’t you want to try a challenge like that? 😉 At first glance, it seems like a super easy […]

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著者: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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Recent posts

Why Do Cats Survive Big Falls? Slow-Mo Reveals the Physics Behind Their “Super Landing”!

2025年11月18日

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The 90% Rule: A Science Trainer’s Ultimate Checklist to Stop Your Workshop from Turning into a Nightmare

2025年11月15日

“Where Is the Image?” Hands-On Mirror Magic with a Half-Mirror – A Fun Experiment Leading to the Law of Reflection

2025年11月15日

Wireless Wonders: Experience the ‘Invisible Force’ of Faraday’s Induction

2025年11月15日

Easy Home Science! Project an “Upside-Down World” on Your Wall — The Magic of Lenses and Light

2025年11月14日

Turning Fear into “Wow!”: A Complete Guide to Pig Eye Dissection (Prep to Cleanup)

2025年11月13日

Catch the Bending Light! Four Pins Reveal the Hidden Path of Light (Can You See Through the Trick Photo?)

2025年11月13日

Why Pixar’s Clouds Matter: A Science Teacher’s Lesson from “The Good Dinosaur”

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