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The Japanese robot most often associated with the 1930s is Gakutensoku, a humanoid automaton created by biologist Makoto Nishimura in 1928. That date places it in the late 1920s, not the 1930s. The Osaka Science Museum describes it as Asia’s first robot, though “first” depends on how robot is defined. The object now displayed at the museum is a 2008 restoration, not the original.
What was Gakutensoku?
Gakutensoku was a large, humanlike automaton made by Makoto Nishimura, a biologist associated with the Osaka Mainichi newspaper. Its name is explained by the Osaka Science Museum as “learning from the laws of the universe (natural science).” The museum also notes that its design combined facial characteristics from different ethnic groups, making the machine an expression of ideas about nature and human likeness as well as a mechanical invention.
It is often called Japan’s first robot, and the Osaka Science Museum describes it as Asia’s first robot. Those labels should be read with care: Gakutensoku was an automaton, not a modern autonomous robot, and claims of “first” depend on what counts as a robot.
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When was it built?
Nishimura created Gakutensoku in 1928, and it was shown at the Kyoto exposition that year, according to the museum’s exhibit information and its 2008 restoration announcement. The 1928 date is the key correction to the “1930s Japanese robot” framing: the machine belongs to the late 1920s, even though it may appear in accounts of Japanese robots from the following decade.
How did Gakutensoku work?
The Osaka Science Museum says the machine ran on compressed air and could move for about three minutes. Its exhibit text states, “Running on compressed air, it moves for about 3 minutes.” This describes a brief operating runtime, not independent decision-making or continuous operation.
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A Nippon.com historical feature additionally reports that Gakutensoku could change its facial expressions and write messages with a mechanical pen. Those details offer a sense of the effects it could produce, but they are reported by that secondary account rather than specified as technical measurements by the museum.
What happened to the original?
The original was exhibited in 1928 and later went missing. The Osaka Science Museum and Nippon.com connect its disappearance to a tour that included Germany, but the available accounts do not establish exactly when, where, or how it was lost. It is therefore most accurate to say that the original is reported lost during or after the Germany tour, rather than present its disappearance as a solved story.
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Where can you see Gakutensoku today?
The Osaka Science Museum displays a restoration made for public exhibition in 2008. The museum’s announcement gives the restored machine’s height as 3.2 metres, and Japan Cultural Expo identifies the museum object as a replica. It is not the original automaton. Check the museum’s current exhibit and visitor information before planning a visit, since display status can change.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Further reading on early Japanese robots
The National Diet Library catalogs Haruki Inoue’s Japanese-language book Nihon Robot Soseiki: 1920–1938 (日本ロボット創世記 : 1920～1938), published by NTT Publishing in February 1993. The 361-page book covers the early history and reception of robots in Japan. The catalog entry establishes the book’s publication details, not its current retail availability.
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The National Diet Library also describes Nishimura’s 1930 book Daichi no harawata as discussing his motivation, ideals, and ingenuity in making Gakutensoku. Its catalog record is useful for identifying the work, but does not establish current availability.
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