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2025年9月4日 / Last updated : 2026年8月27日 桑子 研 Science

Test Your Reflexes with a Ruler! Reaction-Time Experiment #1 (Eyes → Brain → Spinal Cord → Hand)

I’m Ken Kuwako, a Science Trainer. Every day is an experiment! When teaching topics such as “the rate of chemical reactions” or “the speed of nerve impulses,” students often come up with simple but fascinating questions: “How can we actually measure speed?” or “Is there really a difference?” This reaction time experiment is perfect for […]

2025年9月4日 / Last updated : 2026年7月25日 桑子 研 Science

The Physics of Splash Mountain: Decoding a 16-Meter Terrifying Drop Through Science! 【Physics of Disneyland】

I’m Ken Kuwako, the Science Trainer. Every day is an experiment. Did you know you can actually calculate the speed of Splash Mountain? The image was created using generative AI. Whenever I ask my students, “Who’s been on Splash Mountain at Tokyo Disneyland?” almost every hand shoots into the air. For them, Tokyo Disneyland is […]

2025年9月3日 / Last updated : 2025年9月3日 桑子 研 Science

Don’t know where θ goes? Clear it up with a drawing trick! (A story connecting nursing and high school physics on “Force Decomposition”)

I’m Ken Kuwako, a science trainer. Every day is an experiment. Even Nursing Students Struggle?! Let’s Make Physics Fun with Remedial Education! Have you ever heard of remedial education? Simply put, it’s about “supplementing the foundational academic skills needed for university studies.” A lot of students in nursing programs, in particular, struggle with physics, so […]

2025年9月2日 / Last updated : 2025年9月2日 桑子 研 Science

Draw a Face on a Balloon: Making Invisible Forces Visible! A Magical Way to Master Physics’ “Force Arrows”

Have you started high school and are already scratching your head over the basic science courses? Physics, especially, can be a major headache. You’re told, “Draw the forces!” but they’re invisible, so how can you even begin? Many people feel lost. Even if your teacher tells you, “First draw the force of gravity, and then […]

2025年9月2日 / Last updated : 2026年7月8日 桑子 研 Science

The Classroom Becomes the Cosmos! A DIY Cardboard Planetarium Dome (The Day the Room Filled with Stars)

I’m Ken Kuwako, the Science Trainer. Every day is an experiment. How a Cardboard Box Turned an Entire Classroom into a Planetarium Have you ever imagined switching off the classroom lights and suddenly finding yourself beneath a sky filled with thousands of stars? It sounds like magic—but with a few sheets of cardboard and a […]

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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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