{"id":55341,"date":"2025-11-03T05:40:10","date_gmt":"2025-11-02T20:40:10","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=55341"},"modified":"2025-11-03T05:40:10","modified_gmt":"2025-11-02T20:40:10","slug":"gennai-hiraga-the-edo-era-wizard-who-shocked-japan-with-the-elekiter","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=55341&lang=en","title":{"rendered":"Gennai Hiraga: The Edo-Era Wizard Who Shocked Japan with the “Elekiter”"},"content":{"rendered":"

I’m Ken Kuwako, a Science Trainer. Every day is an experiment!<\/strong><\/span><\/p>\n

Have you ever heard the word “Elekiter”? The Elekiter was the very first full-scale “static electricity generator” to be officially introduced to Japan.<\/p>\n

\u3010Listen to this article on the radio here<\/a>\u3011<\/p>\n

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Quoted from “Biography of Gennai Hiraga” (Shueisha)<\/p>\n

The man who repaired and restored this “magical” machine\u2014a broken device imported from the Netherlands\u2014and thus etched his name into the history of Japanese science, was none other than Gennai Hiraga. When you hear “static electricity,” you might think of that little “zap!” you get when you touch a doorknob in the winter. But did you know that even in Japan’s Edo Period, experiments using static electricity were already being conducted?<\/p>\n

The first person to successfully restore the Elekiter (static electricity generator) in Japan was the master Gennai Hiraga.<\/p>\n

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The Elekiter’s mechanism is essentially a combination of a “Van de Graaff generator” (for producing static electricity) and a “Leyden Jar” (a device for storing the charge), both of which you might find in a modern school science lab. By turning a handle, it creates static electricity through friction (the Van de Graaff’s role) and then stores that electrical charge in a storage jar (the Leyden Jar’s role).<\/p>\n

It is said that Gennai Hiraga used this device to perform static electricity experiments and “Electric Shows” for feudal lords and common townspeople. Imagine him making someone touch the stored electricity for a shocking “ZAP!” or shooting sparks in the dark… He must have seemed like a true wizard!<\/p>\n

The Location of Gennai Hiraga’s Experiments<\/h3>\n

The place where Gennai Hiraga reportedly conducted his experiments is still standing today in Kiyosumi-Shirakawa, Tokyo. Doesn’t it sound exciting that a site for cutting-edge science experiments from the Edo Period remains in the modern world? I decided to visit this very spot. Let’s trace the stage of Edo-era science and delve deeper into the achievements of Gennai Hiraga!<\/p>\n

Site of Gennai Hiraga’s Elekiter Experiments<\/h3>\n

A stone monument now stands at the site where Gennai Hiraga performed his Elekiter experiments. Here is the location:<\/p>\n

\u3012135-0024<\/span> \u6771\u4eac\u90fd\u6c5f\u6771\u533a<\/span>\u6e05\u6f841-2-1<\/span><\/p>\n