JEOL Brand Guidelines: Electron Microscopes From Mitaka, 1949, and a Home in Akishima

Naval engineers, a borrowed workshop and an electron microscope.

JEOL began in the years just after the Second World War. English Wikipedia says its founders, Kenji Kazato and Kazuo Ito, met while working at the Naval Central Institute in Tokyo during the war. Japanese Wikipedia says that in 1946 Kazato and a group of former naval engineers began designing and building electron microscopes at a business in Mobara, in Chiba Prefecture; English Wikipedia adds that the group’s prototype, the DA-1, was sold to Mitsubishi in 1947. A disagreement over the direction of that business led Kazato and Ito to leave and start again on their own.

On 30 May 1949, Japanese Wikipedia says, they opened the Japan Electron Optics Laboratory Co., Ltd. in Mitaka, in western Tokyo, in space rented from the radio maker Japan Radio. The company’s own timeline lists the JEM-1 transmission electron microscope as completed that year; English Wikipedia dates the first commercial model to a year later. Engineers who later left the Mobara business joined them too, Japanese Wikipedia says.

The name came from the initials. The company says “JEOL” was formed from the first letters of Japan Electron Optics Laboratory, and in 1961 it adopted JEOL Ltd. as its formal name; in Japanese it became Nihon Denshi, “Japan Electron.” Japanese Wikipedia notes that the company kept the four letters from its founding years so that its name would carry abroad. The same year the first building of its present head office in Akishima, on the western edge of Tokyo, was finished. The company joined the Second Section of the Tokyo Stock Exchange in 1962 and its First Section in 1966, its timeline says, and Japanese Wikipedia lists it today on the exchange’s Prime Market.

From electron optics to NMR, mass spectrometry and beams.

Electron microscopes remained the core, but the range widened quickly. In 1955, the company says, it received its first order from abroad, for a JEM-5G microscope, from the French Atomic Energy Commission. In 1956 it completed the JNM-1, which it calls Japan’s first nuclear magnetic resonance system. The JMS-01 mass spectrometer and an automatic-recording liquid chromatograph followed in 1963, and in 1966 the JSM-1, its first scanning electron microscope, and the JEM-1000, a 1,000-kilovolt instrument. The company says the JLC-5AH of 1968 was an early amino acid analyser, and that in 1976 the first micrograph of atomic arrangements was taken with a JEOL microscope.

Sales offices spread with the products. Its timeline lists JEOL USA, its first overseas subsidiary, in 1962, then companies in France in 1964, in the United Kingdom and Australia in 1968, and in the Netherlands and Sweden in 1973, with later offices from Mexico and Singapore to India and Brazil. Later lines include the JEM-ARM atomic-resolution microscopes, the GRAND ARM 2 of 2019, the NeoScope benchtop scanning microscopes and field-emission cryo-electron microscopes such as the JEM-Z300FSC. In 2021, the company says, it completed an electron-beam metal 3D printer, the JAM-5200EBM, and an electron diffractometer developed jointly with Rigaku.

Recognition has come from the analytical-chemistry trade. English Wikipedia says the AccuTOF mass spectrometer won a bronze award at the 2002 Pittsburgh Conference, the DART ion source a Pittcon Editors’ Gold Award in 2005, and that Kazato and Ito received the Pittcon Heritage Award in 2016. The same article notes that the DART system appeared in the television series CSI: NY, and the company says its instruments have supported researchers including Nobel Prize winners.

Design and documentation.

Laboratory instrument makers tend to present themselves through the laboratory itself. Their pictures are usually of benchtop instruments in bright white rooms: chromatographs, spectrometers and titrators lined up on long benches, with sample trays loaded and a screen beside each one showing a chromatogram’s peaks or the curve of a spectrum. The instrument is often shown with its door open or a vial in a gloved hand, so that the scale of the work is clear.

People appear in a familiar costume. Scientists in white coats, safety glasses and nitrile gloves lean over a pipette, check a result on a monitor or load a rack of samples, and the setting is usually a clean, well-lit room rather than a factory floor. Lab automation brings its own imagery: pipetting robots moving across a deck of microplates, grippers lifting a plate from one station to the next, and close-ups of tips, tubes and wells.

The same settings recur across the category: product photographs on plain white or pale grey backgrounds, cut-away diagrams of an instrument’s inner path, and data shown as it would appear on the screen — a set of peaks, a spectral curve, a titration curve or a grid of wells coloured by result. In this kind of picture the instrument, the sample and the data carry the message, and a maker’s name usually appears as a badge on the casing or a logo in the corner.

Trade fairs remain central to how the industry shows itself. Exhibitions such as analytica in Munich, Pittcon in the United States and ACHEMA in Frankfurt bring instrument makers together on large stands, where new instruments are launched and demonstrated. The guides that follow look at what can be checked about each maker — who founded it, who owns it and how its name has changed — and keep the company’s own claims separate from what independent sources record.

Two J strokes around a globe.

The shape of the company has changed in recent years. Its medical business began, a filing summary says, with automated clinical chemistry analysers in 1972; the company’s timeline records the Clinalyzer that year and the BioMajesty analyser in 1996. On 2 September 2025 JEOL announced that it would move the business into a new subsidiary and transfer that company’s shares to the medical-equipment maker Sysmex, with Sysmex taking it over on 1 April 2026, according to a FilingReader summary of the Tokyo Stock Exchange filing; Japanese Wikipedia records the transfer as made on that date. JEOL now describes two segments: Scientific and Metrology Instruments, and Semiconductor and Industrial Equipment, the latter including electron-beam lithography systems and electron-beam sources.

Other ties run to another Japanese optics name. Japanese Wikipedia says that in 2014 JEOL agreed a capital and business alliance with Nikon, which became its largest shareholder; the company’s timeline lists a capital increase that year and a JEOL–Nikon correlative light and electron microscopy centre in 2017. Its factories include works in Musashimurayama, opened in 2021, and a plant at Tendo in Yamagata Prefecture run by a subsidiary since 2004, its timeline says.

The present symbol dates from the company’s 65th anniversary in June 2014. JEOL says it is built from two dynamic “J” strokes, standing for its founding ideas of creativity and research and development, around a circle for the globe, in a deep blue and an emerald green.

For a design guide, JEOL shows how a research-instrument maker can turn a set of initials into a lasting name. Compare Shimadzu, another Japanese instrument maker, and Bruker, which also builds NMR systems. For this guide we use a navy, a white and a green with a sans, an unofficial interpretation; no product or logo is reproduced.

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