Eiichi Hosokawa was a Japanese industrialist and a pioneering inventor in the field of fine grinding mill technology. He is credited for inventing the "Micron mill" and is also known for founding Hosokawa Micron Corporation.History of Publication of KONA Powder and Particle Journal: From Japanese Innovation to Global Recognition—A 43-Year Journey (1983–2026); KONA Powder and Particle Journal; Vol. 43; p. 327–331; 2026 doi:10.14356/kona.2026023
Biography Hosokawa was born in 1889, a time of Japan's rapid industrialization, in Tsuna-gun (now Sumoto-shi), Awaji Island, Hyogo Prefecture, Japan. He was educated under Japan's old system of education until he graduated from high school. He then completed a degree from the Nagoya Technical School.Episode of Eiichi Hosokawa, the founder; Hosokawa Micron Corporation; Hosokawa married Hatsu Osame, a sister of Gohei Osame, a specialist in the development of sulphuric acid manufacturing equipment.
Hosokawa Micron In 1914, Hosokawa founded Hosokawa Turbine Water Mill Company, which manufactured water mills and pumps.Suzuoki, Takabumi (1985); Case Studies: Hosokawa Micron Corporation; Journal of Japanese Trade & Industry, 1985, vol 4; p. 17-18 Another source cited that the founding was April 18, 1916,Hosokawa Micron Corp. Company Profile & Executives; WSJ; and the company was headquartered in Osaka. He then invented the Hosokawa Micron mill in 1930 and founded the Hosokawa Ironworks. This machine was a type of air classifying mill (ACM) noted for its efficiency.Kogel, Jessica Elzea (2006); Industrial Minerals & Rocks: Commodities, Markets, and Uses; SME; ISBN 978-0-87335-233-8; p. 979
Since Eiichi was an engineer, he had little interest in business. It was only after his son Masuo joined the company that the business began to prosper.
Today, Hosokawa Micron is considered a world leader in fine powder processing equipment with an estimated 30 percent share in the global fine powder market."Hosokawa Micron Corporation” (2026); Shared Research; Eiichi Hosokawa's descendant, Kohei Hosokawa is currently the president and CEO of Hosokawa Micron Corporation.
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