co. ltd. company logo used since 2009 native name type public kk traded as tyo 6963 ose 6963 industry electronics semiconductor founded kyoto japan september 17 1958 1958 09 17 founder kenichiro sato headquarters 21 saiin mizosaki cho ukyo ku kyoto 615 8585 japan area served worldwide key people satoshi sawamura ceo and president products lsis semiconductor discrete semiconductors optoelectronics passive components led lighting revenue 1 743 million fy 2013 1 292 411 million fy 2012 operating income 9.798 million fy 2012 921 million fy 2012 profit 558.128 million fy 2012 52 464 million fy 2012 total assets 7 436 million fy 2012 699 014 million fy 2012 total equity 6 528 million fy 2012 613 647 million fy 2012 number of employees 20 203 as of march 31 2013 website official website footnotes references 2 rohm semiconductor r mu kabushiki gaisha is a japanese electronic parts manufacturer based in kyoto japan . rohm was incorporated as toyo electronics industry corporation by kenichiro sato on september 17 1958 . the company was initially known as r.ohm 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 . ic s and discrete semiconductors now account for about 80 % of rohm s revenue . through 2012 rohm was among the top 20 semiconductor sales leaders . history edit 1954 toyo electronics industry established carbon film resistors developed and marketed 1966 rohm wako co. ltd. established 1969 began development of ics rohm apollo co. ltd. established japan 1970 established u.s. subsidiary company exar in california 1971 started research and development of integrated circuits ics in silicon valley rohm electronics gmbh established transistor developed and marketed 1979 corporate name is changed from r.ohm to rohm 1984 first in the world to succeed in the practical industrial use of laser diodes with mbe methodology 1986 listed on the first section of the osaka stock exchange memory ics developed and marketed 1988 obtained basic patent of flash memory in the usa 1989 rohm wako electronics sdn bhd rwem established malaysia 1 rohm electronics philippines inc. repi established 1990 began sales of led message boards 1991 established rohm music foundation 1994 sells out remaining exar ownership 1996 rohm wako device co. ltd. established japan rohm electronics korea corporation established rohm electronics philippines sales corporation established 1997 started mass production of red laser diodes for dvds 2002 optical device research center opened 2008 acquired oki electric industry s semiconductor business . 3 2009 market leader kionix an mems supplier becomes a subsidiary of rohm . 4 2010 acquired maruzen electric 5 2011 made a 50 year contract with kyoto city government for the naming rights of kyoto kaikan naming rohm theatre kyoto in july 2013 references edit annual report 2013 pdf . retrieved march 27 2014 . corporate data . retrieved march 27 2014 . rohm to buy oki electric s chip business . reuters . may 28 2008 . retrieved march 27 2014 . rohm co. ltd. acquisition of kionix inc. . i micronews . october 13 2009 . retrieved march 27 2014 . company history . retrieved march 27 2014 . external links edit official website english welcome to rohm semiconductor gmbh europe welcome to rohm semiconductor usa llc v t e electronics industry in japan companies current alaxala networks alinco alps alpine anritsu aor audio technica brother canon casio citizen watch cosina d & m holdings denon marantz daikin dainippon screen denso dnp eiki eizo elpida esp guitars fanuc fostex fuji electric fujifilm fuji xerox fujitsu fujitsu ten funai furuno futaba hamamatsu photonics hirose electric hitachi clarion hitachi maxell hoya ibanez icom ikegami tsushinki 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