ROHM Semiconductor is a Japanese electronic parts manufacturer based in Kyoto, Japan. ROHM was incorporated
as Toyo Electronics Industry Corporation on September 17, 1958.

The name was officially changed to Rohm in 1981 and then changed again to "ROHM Semiconductor" in January 2009.
When ROHM was established, resistors were its main product. Later, ROHM began manufacturing semiconductors.
IC's and discrete semiconductors now account for about 80% of ROHM's revenue.

"R" represents the first letter of its original main product, Resistors. This was put together with the unit for resistance
"ohm". The "R" now also stands for "Reliability". "Quality First" is ROHM's corporate policy.
As of 2011, ROHM is among the Worldwide Top 20 Semiconductor Sales Leaders.