Rohm Co., Ltd.
Native name
Company typePublic KK
TYO: 6963
OSE: 6963
FoundedKyoto, Japan (September 17, 1958 (1958-09-17))
FounderKenichiro Sato
Headquarters21 Saiin Mizosaki-cho, Ukyo-ku, Kyoto 615-8585 Japan
Area served
Key people
Tadanobu Fujiwara, (CEO and President)
RevenueDecrease ¥ 352,010 million (FY 2017)[1] (¥ 352,369 million) (FY 2016)
Increase ¥ 31,828 million (FY 2017) (¥ 25,686 million) (FY 2016)
Increase ¥ 26,450 million (FY 2017) (¥ 25,702 million) (FY 2016)
Total assetsIncrease ¥ 834,503 million (FY 2017) (¥ 804,134 million) (FY 2016)
Total equityIncrease ¥ 725,453 million (FY 2017) (¥ 706,251 million) (FY 2016)
Number of employees
21,308 (as of March 31, 2017)
WebsiteOfficial website
Footnotes / references

Rohm Semiconductor (ローム株式会社, Rōmu Kabushiki-gaisha) (styled as ROHM) is a Japanese electronic parts manufacturer based in Kyoto, Japan. Rohm was incorporated as Toyo Electronics Industry Corporation by Kenichiro Sato (佐藤 研一郎) on September 17, 1958.

The company was originally called R.ohm,[3] which was derived from R for resistors, the original product, plus ohm, the unit of measure for resistance.

The name of the company was officially changed to Rohm in 1979 and then changed again to Rohm Semiconductor in January 2009.

When Rohm was established, resistors were its main product. Later, the company began manufacturing semiconductors. ICs and discrete semiconductors now account for about 80% of Rohm's revenue.

Through 2012, Rohm was among the top 20 semiconductor sales leaders.

Rohm office building in Kyoto

International expansion

In 2016, Rohm started the construction of their production facility in Kelantan, Malaysia and commenced the operation in April 2017. A few years later in 2022, Rohm expanded their facility by approximately 1.5 times bigger with the plan to start operating in 2023. The original plant mainly focuses on the production of discrete semiconductors such as diodes while the expanded facility will be focusing on the production of analog LSIs and transistors.[4]

Integrated circuits

FeRAM and other LSI integrated circuits are designed and manufactured by the Lapis Semiconductor division of Rohm, formerly OKI Semiconductor, a division of Oki Electric.[5][6][7][8]


  1. ^ "Annual Report 2017" (PDF). Archived from the original (PDF) on February 21, 2018. Retrieved February 20, 2018.
  2. ^ "Corporate Data". Retrieved March 27, 2014.
  3. ^ "Company | ROHM Semiconductor". Retrieved 2022-12-12.
  4. ^ "ROHM Group establishes a New Production Facility in Malaysia to increase production capacity of analog LSIs and transistors". Rohm Semiconductor. 14 December 2021. Retrieved 15 March 2022.
  5. ^ "Lapis FeRAM" (PDF).
  6. ^ "Lapis Semiconductor History".
  7. ^ "Lapis Technology History".
  8. ^ "ROHM Semi Announces Name Change of Subsidiary OKI Semi to Lapis Semiconductor".