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2026年3月13日 / Last updated : 2026年3月13日 桑子 研 Science

Do Cherry Trees Hire Guards with “Nectar”? The Secret Survival Strategy Hidden in Jagged Leaves and Tiny Red Dots

Hi, I’m Ken Kuwako, your Science Trainer. Life is one big experiment! 【This article is also available on my radio channel!】 The Surprising Side of Sakura Let’s take a quick look at the “profile” of the cherry blossom tree, or Sakura. Scientifically, it belongs to the Rosaceae (Rose) family and is a deciduous broad-leaved tree. […]

2026年3月12日 / Last updated : 2026年3月12日 桑子 研 Science

Make Invisible Electricity Visible! Exploring Capacitor Discharge with Hand Calculations and Modern Sensors

I’m Ken Kuwako, your Science Trainer. Every day is an experiment. Our lives are powered by smartphones and home appliances, and inside almost every one of them is a tiny component called a “capacitor.” Its job is simple yet vital: storing and releasing electricity. But since we can’t see electricity with the naked eye, it’s […]

2026年3月11日 / Last updated : 2026年3月11日 桑子 研 Science

No Sensors Needed!? A Magical Interactive Game Powered by Scratch and Human Power

I’m Ken Kuwako, your Science Trainer. Every day is an experiment! Have you ever been to a high-tech arcade and played those “motion-sensing” games? You throw a ball at the screen, and the characters react instantly—it feels like pure magic. You might find yourself wondering, “What kind of incredibly complex sensors are they using?” But […]

2026年3月10日 / Last updated : 2026年3月10日 桑子 研 Science

The Motor’s “Commutator” in Plain Sight! A Teaching Device That Skyrockets Student Understanding (Electromagnet Motor Demonstrator)

I’m Ken Kuwako, Science Trainer. Every day is an experiment. “How can a heavy machine start spinning just by switching on the electricity?” This simple question marked a giant leap for modern civilization: the birth of the motor. Today, our lives are unthinkable without them. They power everything from your smartphone’s vibration and the family […]

2026年3月9日 / Last updated : 2026年3月9日 桑子 研 Science

Was Clover the Bubble Wrap of Edo Japan? The Surprising History Hidden in the Name “Shirotsumekusa”

I am Ken Kuwako, your Science Trainer. Remember: every day is an experiment. When the soft sunlight of spring arrives, white clover begins to paint our parks and riverbanks in shades of white. Many of you probably have fond memories of hunting for that elusive four-leaf clover or weaving delicate flower crowns as a child. […]

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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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