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Company History

Toshiba History: Founding, Growth & Key Milestones

Founded 1875 in Tokyo, Japan

When was Toshiba founded?

Toshiba was founded in 1875 in Tokyo, Japan by Hisashige Tanaka and Ichisuke Fujioka, making it 151 years old.

Founded
1875
Founding place
Tokyo, Japan
Founders
Hisashige Tanaka and Ichisuke Fujioka
Headquarters today
Kawasaki, Kanagawa, Japan
Milestones documented
12 (1875–2026)
Current CEO
Taro Shimada
Acquisitions
3
YearEvent
1875Tanaka Seisakusho founded
1890Hakunetsusha founded
1939Tokyo Shibaura Electric formed
1977Acquired Semp
2006Westinghouse Acquired
2014Acquired OCZ Storage Solutions
2015Accounting scandal
2017Westinghouse bankruptcy
2018Memory business sold
2023Toshiba taken private
2026FY2025 results show private-company reset
2026Kioxia stake cut to 12.84%
Where was Toshiba founded?
Toshiba was founded in Tokyo, Japan in 1875. wikidata.org
Who founded Toshiba?
Toshiba was founded by Hisashige Tanaka and Ichisuke Fujioka.
When did Toshiba start?
Toshiba was founded in 1875.
How old is Toshiba?
Toshiba is 151 years old as of 2026.

Founding Story

Two separate companies started in the same Meiji-era period of Japanese industrial formation and merged a century later. Tanaka Seisakusho, founded by Hisashige Tanaka in 1875, manufactured telegraphic equipment. Hakunetsusha, founded by Ichisuke Fujioka in 1890, produced Japan's first incandescent lightbulbs. The two merged in 1939 to form Tokyo Shibaura Electric, Toshiba, at the instruction of the Mitsui zaibatsu, which held controlling stakes in both companies. The postwar decades produced consumer electronics, home appliances, and heavy electrical equipment sold under a single brand across international markets. The company launched Japan's first radar system, first television broadcast equipment, and first color television. That accumulated manufacturing and brand credibility gave Toshiba the scale to pursue larger industrial opportunities when they appeared. The 2006 acquisition of Westinghouse Electric Company for $5.4 billion was made at the peak of expectations for nuclear power's comeback. Oil prices were rising. Carbon reduction targets were creating policy pressure. New reactor designs promised lower construction costs. The strategic logic was coherent. The execution was not. Westinghouse had accepted fixed-price contracts to build AP1000 reactors in the United States at estimates that proved dangerously optimistic once construction began. Labor shortages, regulatory requirements, and design changes turned estimated costs into actual costs that bore no resemblance to the original numbers. When the Westinghouse bankruptcy and write-off arrived in 2017, it found a company already weakened by the 2015 accounting fraud revelation, a $1.2 billion multi-year manipulation of profit figures across multiple divisions. The two crises together threatened the company's existence and forced an emergency restructuring that ultimately produced the privatized, narrowed industrial business that completed its transformation in December 2023.

Founders

Hisashige Tanaka

Hisashige Tanaka opened Tanaka Seisakusho in Tokyo in July 1875 to make telegraph equipment, the date Toshiba uses as its founding. The business later became Shibaura Seisakusho, a heavy electrical machinery maker. In 1939 it merged with Tokyo Electric, the successor to Hakunetsusha, to form Tokyo Shibaura Electric. Tanaka was born on October 16, 1799 and died on November 7, 1881. He was also a scholar of rangaku, or Western learning, in the late Edo and early Meiji periods, and has been called the Thomas Edison of Japan. Hisashige Tanaka was born in 1799.

Ichisuke Fujioka

Ichisuke Fujioka co-founded Hakunetsusha in 1890 to make incandescent lamps in Japan. The company later became Tokyo Electric and partnered with General Electric. In 1939 it merged with Shibaura Seisakusho to form Tokyo Shibaura Electric, which was renamed Toshiba Corporation in 1984. Ichisuke Fujioka was born in 1857.

Key Milestones

1875

Tanaka Seisakusho founded

Hisashige Tanaka founded the engineering business that became one of Toshiba's predecessor companies.

Source: global.toshiba
1890

Hakunetsusha founded

Ichisuke Fujioka established the electric-lamp business that became another key Toshiba predecessor.

Source: global.toshiba
1939

Tokyo Shibaura Electric formed

The merger of predecessor businesses created Tokyo Shibaura Electric, later known as Toshiba.

Source: global.toshiba
1977

Acquired Semp

Toshiba acquired Semp in 1977.

Source: en.wikipedia.org
2006

Westinghouse Acquired

Toshiba bought the nuclear business Westinghouse Electric in 2006 for about $5.4 billion.

Source: en.wikipedia.org
2014

Acquired OCZ Storage Solutions

Toshiba acquired OCZ Storage Solutions in January 2014.

Source: en.wikipedia.org
2015

Accounting scandal

An independent committee found that Toshiba had overstated profits across several businesses over multiple years. Leadership resigned and earlier results were restated.

Source: en.wikipedia.org
2017

Westinghouse bankruptcy

Westinghouse Electric, acquired in 2006 for $5.4 billion, filed for Chapter 11 after U.S. AP1000 cost overruns, leaving Toshiba with heavy losses.

Source: en.wikipedia.org
2018

Memory business sold

Toshiba sold Toshiba Memory, later renamed Kioxia, to a Bain Capital-led consortium while keeping a minority stake.

Source: en.wikipedia.org
2023

Toshiba taken private

A Japan Industrial Partners-led consortium took Toshiba private, ending its long public listing and giving management room to restructure.

Source: global.toshiba
2026

FY2025 results show private-company reset

Toshiba reported FY2025 net sales of ~$24.9 billion (JPY 3,709.1 billion) and listed Taro Shimada as President and CEO.

Source: global.toshiba
2026

Kioxia stake cut to 12.84%

Toshiba sold more Kioxia shares during the 2026 memory-stock rally. Its stake fell to 12.84% by September 7, 2026.

Source: en.sedaily.com

Major Acquisitions

Semp

1977

Toshiba acquired Semp in 1977.

Westinghouse Electric Company

2006

Toshiba bought a majority of Westinghouse in 2006 for $5.4 billion to expand in nuclear power plant construction and services.

OCZ Storage Solutions

2014

Toshiba acquired OCZ Storage Solutions in 2014.

Keep researching Toshiba

Toshiba Company History FAQ

When, where, and by whom were Toshiba's foundational companies established?

Toshiba originated from two Meiji-era Japanese technology pioneers in Tokyo: Tanaka Seisakusho, founded in 1875 by legendary inventor Hisashige Tanaka to build telegraphic equipment, and Hakunetsusha, founded in 1890 by Dr. Ichisuke Fujioka to manufacture Japan's first incandescent light bulbs.

How did Tanaka Seisakusho and Hakunetsusha merge to form Toshiba in 1939?

In 1939, Shibaura Engineering Works (successor to Tanaka Seisakusho) and Tokyo Electric (successor to Hakunetsusha) merged at the behest of the Mitsui zaibatsu to form Tokyo Shibaura Denki (Tokyo Shibaura Electric Co., Ltd.), which officially adopted the name Toshiba Corporation in 1978.

Who was Hisashige Tanaka and why is he called the "Thomas Edison of Japan"?

Hisashige Tanaka (1799–1881) was a mechanical genius and craftsman who invented Japan's "Myriad Year Clock" (an intricate perpetual mechanical clock) and built Japan's first domestic steam locomotives before founding Tanaka Seisakusho in 1875 at age 75.

How did Toshiba engineer Dr. Fujio Masuoka invent NAND flash memory in 1987?

In 1987, Toshiba semiconductor engineer Dr. Fujio Masuoka invented NAND flash memory, a solid-state rewritable storage medium that revolutionized consumer technology, laying the architectural foundation for every modern smartphone, SSD, and digital camera.

What made the Toshiba T1100 in 1985 a historic computing breakthrough?

Launched in 1985, the Toshiba T1100 is widely recognized as the world's first commercially successful mass-market laptop PC, featuring a rechargeable battery, 3.5-inch floppy drive, and LCD screen, defining mobile computing for the next three decades.

What was the 2006 Westinghouse acquisition and how did it trigger an existential crisis?

In 2006, Toshiba acquired U.S. nuclear company Westinghouse Electric for $5.4 billion. Massive construction cost overruns and delays on AP1000 nuclear plants in Georgia and South Carolina led to Westinghouse filing for Chapter 11 bankruptcy in 2017, inflicting billions in losses on Toshiba.

What was the landmark 2015 accounting scandal at Toshiba?

In 2015, an independent investigative panel revealed that Toshiba top executives had systematically inflated operating profits by $1.2 billion over seven years across its infrastructure and semiconductor divisions, leading to the resignation of CEO Hisao Tanaka.

Why did Toshiba sell its crown-jewel NAND flash memory business to form Kioxia?

Facing imminent delisting and negative shareholders' equity following the Westinghouse collapse in 2018, Toshiba sold its memory-chip unit to a Bain Capital-led consortium for $18 billion. The business was rebranded as Kioxia Holdings Corporation.

Why was Toshiba taken private by Japan Industrial Partners (JIP) in December 2023?

After years of boardroom conflict between domestic management and foreign activist hedge funds, a domestic consortium led by Japan Industrial Partners (JIP) completed a ¥2 trillion (~$14 billion) tender offer, delisting Toshiba from the Tokyo Stock Exchange on December 20, 2023.

What was the divestiture of consumer electronics, appliances, and PCs?

To survive its debt crisis, Toshiba systematically exited consumer markets: selling Toshiba Medical Systems to Canon (2016), home appliances to Midea (2016), its television division to Hisense (2017), and its Dynabook PC business to Sharp (2018).

What is the May 2024 "Revitalization Plan" launched under CEO Taro Shimada?

Under private ownership, CEO Taro Shimada launched a comprehensive turnaround plan targeting a 10% operating profit margin by FY2026 by eliminating 4,000 domestic jobs, streamlining infrastructure divisions, and investing heavily in power semiconductors and grid transmission.

What is Toshiba's corporate structure and relisting timeline today?

Headquartered in Kawasaki, Japan, Toshiba operates as a private industrial conglomerate with approximately 94,000 employees, using proceeds from selling its remaining Kioxia shares to fund modernization ahead of an anticipated public relisting around FY2028.

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