Hiraga Gennai
Edo-period polymath, inventor of the Erekiteru and satirist.
Hiraga Gennai was a Japanese polymath and rōnin of the Edo period, known for his work as a pharmacologist, student of Rangaku, author, painter, and inventor. He is best known for creating the Erekiteru (electrostatic generator), Kandankei (thermometer), and Kakanpu (asbestos cloth). His literary works include satires and guidebooks on male prostitutes.
Quick Facts
- Born
- 1729
- Other names
- Kyūkei, 鳩渓,, Fūrai Sanjin, 風来山人,, Tenjiku rōnin, 天竺浪人, and Fukuchi Kigai, 福内鬼外
- Occupation
- author, painter and inventor
Facts from the source article.
Biography
Hiraga Gennai came into the world in 1729 as the third son of a low-ranking samurai named Shiroishi Mozaemon, who served the Takamatsu Domain. His birthplace was the village of Shidoura in Sanuki Province, an area now within modern Sanuki, Kagawa. The Shiroishi family had once been warlords called Hiraga in Shinano Province, but after losing to the Takeda clan, they fled to Mutsu Province, took the name Shiroishi from a place there, and entered the service of the Date clan. They later moved with a Date branch to Uwajima in Shikoku, then settled in Takamatsu, where they farmed to supplement their small samurai income. As a child, Gennai studied Confucianism and haiku poetry and made hanging scrolls. At age 12, in 1741, he apprenticed to a physician to learn herbalism. By 18, he had a job in the local daimyo’s herb garden. His father died in 1748, making Gennai head of the household. In 1752, he went to Nagasaki to study Western medicine and other rangaku subjects. Two years later, he gave his house to his sister’s husband. While in Nagasaki, contact with Chinese merchants and Dutch East India Company members sparked his interest in ceramics. He then moved to Osaka and Kyoto in 1755 to study herbal medicine under Toda Kyokuzan, and finally settled in Edo in 1757.
Grave of Hiraga Gennai
Hiraga Gennai's grave is at the temple of Sosen-ji in Asakusabashi (now Hashiba, Taitō-ku, Tokyo). Behind it lies the grave of his manservant Fukusuke, and a stone monument bears an epitaph by his friend Sugita Genpaku. The tomb was reconstructed by Count Yorinaga Matsudaira in 1931 and designated a National Historic Site in 1943. He also has a second grave at the Hiraga family bodaiji in Sanuki, Kagawa.
Works
Gennai published many literary works, including the well-known satire On Farting. This work explores encounters between high and low culture in Ryōgoku, an entertainment district in Edo. In the story, Gennai debates a Confucian samurai named Ishibe Kinkichirō about a peasant who gained fame as a fart-ist. Gennai argues the performance is impressive and unique, while the samurai contends it violates Confucian etiquette. Through their dialogue, Gennai highlights conflicting value systems: the samurai sees the act as an offense against propriety, while Gennai views it as embodying wisdom and creativity. Both agree a fart is a useless discharge, but they disagree on its meaning. The samurai sees it as contrary to teachings of the true sages, while Gennai sees the artist's creativity in making useless excess into music. The work critiques the categorization of material as high or low culture.
Appearances in fiction
Hiraga Gennai appears in various fictional works. In a 1989 TBS film, he is a detective-like protagonist solving an incident in Edo. In the manga Ōoku: The Inner Chambers (2005–2020) by Fumi Yoshinaga, he appears as a scholar/inventor and cross-dressing lesbian. In the anime OVA Mask of Zeguy, he protects Miki alongside Hijikata Toshizo. In the OVA T.P. Sakura, he appears with his elekiter. In the anime Oh! Edo Rocket, a retired resident is revealed to be Gennai, and the Fūrai Row-House Block references his pen name. In Gintama, a mechanic named Hiraga Gengai appears. In Zero no Tsukaima, a character named Hiraga Saito is speculated to be named after Gennai. In Read or Die, Gennai uses his elekiter as a destructive weapon to destroy the White House and combat helicopters. A giant mechanical frog is named after him in Mai-HiME. In Flint the Time Detective, he uses the Time Shifter Elekin to make giant robots. In the game Live-A-Live, a mechanic named Gennai creates mechanical traps in the Bakumatsu Chapter. In Kikaida 01, time-traveling robots threaten him. In Demashita! Powerpuff Girls Z, a character named Hiraga Kennai creates a primitive form of Chemical Z and uses an elekiter to separate a soul from a body.
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