1934
Yehan Numata founded a research laboratory at Musashi Shinden in Tokyo for the domestic production of micrometers.

1936
Founded Kamata Factory at Kamata in Tokyo and named Mitutoyo Manufacture.

1938
Reorganized to stock corporation and Yehan Numata was inaugurated as president.

No.1 Micrometer

1937
Succeeded in domestic production of micrometers.

1940
Constructed Mizonokuchi Factory at Kawasaki, Kanagawa for mass production of micrometers, and immediately started operation.

1944
Constructed Utsunomiya Factory for mass production of high-speed film perforators, and immediately started operation.

1945
Kamata Factory was lost due to war damage.
Mizonokuchi Factory dissolved the organization leaving only security personnel.

1947
Founded Hiroshima Research Laboratory at Shiwa in Hiroshima prefecture for preserving of micrometer manufacturing technologies.

1942
Trial manufacture of gauge blocks

1943
Trial manufacture of capacitance-type electric comparator







1947
Restarted producing micrometers.
Developed an automatic weight sorting machine.

1953
Mizonokuchi Factory became the first factory in Japan that was permitted to carry JIS (Japan Industrial Standard) marks on outside micrometers.

1954
Yehan Numata attended in the International Metrology Conference (U.S.A.), exhibited corporate products and established a foot hold for export.

1955
Opened Tokyo Office and Osaka Office.



1958
Opened Nagoya Office.

1959
Separated the sales department and founded Mitutoyo Trade Corporation instead.
Construced Hiroshima Plant at Kure in Hiroshima prefecture and absorbed Hiroshima Research Laboratory aiming for consistent production of micrometers.

1952
Commenced production of indicating micrometers.
Commenced production of snap meters.
Commenced trial production of small-size calipers.

1953
3Completed a 3m outside micrometer (then world largest).
Commenced production of grinding gages.

1957
Commenced production of projection-type inspection machines.
Commenced production of Height Masters.

1958
Commenced production of Test Indicators.
Commenced production of precision surface plates.
Commenced production of small stainless steel calipers.

1959
Commenced production of dial indicators.
Commenced production of Height Gages.