| 1912 |
- Sharp's founder Tokuji Hayakawa invents "Tokubijo" snap buckle
- Tokuji Hayakawa establishes metalworking shop in Tokyo to manufacture and market "Tokubijo" snap buckles (September 15)
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- Ching Dynasty in China ends (February 12)
- Meiji Emperor of Japan dies (July 30)
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| 1913 |
- Invention of No. 5 Makishima-type adjustable flow faucet
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| 1915 |
- Invention of Hayakawa mechanical pencil
- Establishes Hayakawa Brothers Shokai, a company to manufacture metallic writing instruments
- Begins export of mechanical pencils to the US and Europe
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- American Telephone & Telegraph Co. establishes phone line between New York and San Francisco (January 25)
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| 1916 |
- Mechanical pencil named Ever-Ready Sharp Pencil
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| 1920 |
- Establishes sub-plant in Oshiage, Tokyo
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- Regularly scheduled radio broadcasts begin in the US
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| 1923 |
- Manufacturing facilities burned to the ground during Great Kanto Earthquake (September 1)
- Relocates to Osaka with three employees (December)
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- Great Kanto Earthquake (September 1)
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| 1924 |
- Establishes Hayakawa Metal Works in Osaka
- Begins research on radio technology
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| 1925 |
- Succeeds in assembling first Japan-made crystal radio set. Begins mass production and marketing. Begins marketing of radio parts also (February)
- Establishes sales office in Utsubo, Osaka
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- NHK begins radio broadcasts in Japan (June 1)
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