| 1954 |
Founded as Toyo Electric Manufacturing Co. Started development and sales of carbon film fixed resistors. |
| 1958 |
Established Toyo Electric Manufacturing Co., Ltd. |
| 1962 |
Started in-house production of automatic resistor assembly machines. |
| 1963 |
Development and start of sales of metal film fixed resistors. |
| 1965 |
Published 'Music History in Pictures' (all 5 volumes with sound sheets). Implemented quality control. |
| 1966 |
Established Rohm Wako Inc. and formulated corporate purpose and basic management policies. |
| 1967 |
Developed and started sales of transistors and switching diodes. |
| 1968 |
Completed productization of diode arrays and diode matrices. |
| 1969 |
Established Rohm Apollo Inc. and began IC development. |
| 1970 |
Published 'History of Musical Instruments' (all 5 volumes with sound sheets). Established a local subsidiary in California, USA. Introduced computers for office automation. |
| 1971 |
Started development and sales of transistors. Established Rohm Electronics GmbH. |
| 1972 |
Established ROHM Korea Corporation. |
| 1973 |
Started development and sales of light-emitting diodes and network resistors. |
| 1974 |
Established ROHM Electronics (H.K.) Co., Ltd. and started development and sales of thermal print heads. |
| 1976 |
Started development and sales of corner plate chip fixed resistors. |
| 1977 |
Developed the world's smallest and thinnest chip LED 'PICOLED®'. Obtained ISO/IEC17025 laboratory accreditation. |
| 1979 |
Started corporate PR advertisement series 'Kyoto博物日記' by Rohm-kun. Established Rohm Electronics Asia Pte. Ltd. (RES DIVISION). |
| 1980 |
Development and research of constant voltage diodes completed. |
| 1981 |
Publication of 'Music of Asia' (4 volumes with cassette tapes). Establishment of ROHM Fukuoka Co., Ltd. |
| 1982 |
Development and start of sales of digital transistors. Opening of semiconductor research center. |
| 1983 |
Development and start of sales of band switching diodes. Listed on the Osaka Securities Exchange Second Section. |
| 1984 |
Establishment of ROHM Amagi Co., Ltd. Achieved world-first industrial application of semiconductor lasers using MBE method. |
| 1985 |
Development of microcontrollers using original 4-bit/8-bit CPUs. |
| 1986 |
Publication of PR magazine 'ROHM's Kyoto Expo Diary I'. Started sales of capacitors. Commercialization and sales of memory ICs. Establishment of research and development center. Promoted to First Section of the Tokyo Stock Exchange. |
| 1987 |
Developed the world's first noise-free automotive operational amplifier. Acquired ISO/IEC 17025 testing laboratory certification. |
| 1988 |
Acquired ISO 14001 environmental management system certification. Basic patents for flash memory granted in the US. |
| 1989 |
Establishment of ROHM Mechanical Tech Co., Ltd. Established LCD process technology and started sales. Established ROHM Win UK. Hosted 'ROHM's Music Concert & Play Bach'. |
| 1990 |
Started mass production of SiC-DMOSFET. Introduced in-house LED lighting, high-efficiency air conditioning, and rooftop greening. Renovated ROHM Kyoto Station Building. Started mass production of SiC Schottky Barrier Diodes. |
| 1991 |
Built 'Tsinghua ROHM Electronics Engineering Hall' at Tsinghua University. Established ROHM Semiconductor India Pvt. Ltd. |
| 1992 |
Developed the world's smallest '0402 size' Zener diode. Started mass production of full SiC power modules. ROHM Kyoto Station Building received the Energy Conservation Grand Prize 'Resource and Energy Agency Director's Award'. |
| 1993 |
Held 'Kyoto International Music Student Festival '93'. Established ROHM Mechatech Philippines, Inc. Established ROHM Electronics (Malaysia) Sdn. Bhd. Established manufacturing-related companies in Tianjin. |
| 1994 |
Started serialization of 'ROHM's New Kyoto Expo Diary: Scientific Study of Japanese Folktales'. Acquired ISO 9001 certification. |
| 1995 |
Published CD-ROM 'ROHM's Kyoto Expo Diary - Soundscape Report Edition'. Opened Second LSI Research Center. |
| 1996 |
Established ROHM Electronics (Philippines) Sales Corporation. Established ROHM Electronics Korea Corporation. Established ROHM Wako Devices Co., Ltd. |
| 1997 |
Established ROHM Electronics (France) S.A.S. Established ROHM Electronics (Thailand) Co., Ltd. Opened Yokohama Technology Center. Published CD-ROM 'ROHM's Kyoto Expo Diary vol.2'. |
| 1998 |
Sponsored 'New Japan Philharmonic Orchestra Concert Conducted by Seiji Ozawa'. Started serialization of 'ROHM's New Kyoto Expo Diary'. Opened VLSI Research Center. Acquired ISO 14001 environmental management system certification. |
| 1999 |
Established ROHM Electronics (Shanghai) Co., Ltd. Established ROHM Hamamatsu Co., Ltd. Opened LSI Development Center. Opened Kyoto Technology Center. |
| 2000 |
Sponsored the 'Kyoto Autumn Music Festival Opening Commemorative Concert'. Began sponsorship of 'Seiji Ozawa Music School Opera Project I'. Established ROHM Semiconductor (China) Co., Ltd. Opened Europe Technology Center. |
| 2001 |
Donated to 'Ritsumeikan University ROHM Memorial Hall'. Started afforestation in 'ROHM Forest' in Australia. Opened ROHM (Shin-Yokohama). |
| 2002 |
Established Optical Device Research Center. |
| 2003 |
Started sponsorship of 'Kyoto Student Festival'. Donated to 'Doshisha ROHM Memorial Hall'. Established ROHM Tsukuba Inc. Established ROHM Electronics Trading (Dalian) Co., Ltd. Opened LSI Measurement Technology Center. |
| 2004 |
Opened Taiwan Technology Center. Opened Shanghai Technology Center. |
| 2005 |
Sponsored the Chinese performance of 'Seiji Ozawa Music School Opera Project'. Donated to 'Kyoto University ROHM Memorial Hall'. Opened Korea Technology Center. |
| 2006 |
Japanese SP Classic Album Revival Collection II. Established ROHM Electronics (Shenzhen) Co., Ltd. Established ROHM Integrated Systems (Thailand) Co., Ltd. Opened Nagoya Design Center. Opened Shenzhen Technology Center. |
| 2007 |
Developed the world's smallest and thinnest chip LED 'PICOLED®'. Obtained ISO/IEC17025 testing laboratory accreditation. |
| 2008 |
Obtained development process certification for automotive functional safety standard 'ISO26262'. Announced products equipped with power technology 'Nano' and ultra-low power consumption technology 'Nano Energy™'. |
| 2009 |
Obtained OHSAS18001 occupational health and safety standard certification. Donated ROHM BNCT Center to Kyoto Prefectural University of Medicine. |
| 2010 |
Started mass production of the world's first SiC-DMOSFET. Introduced in-house LED lighting, high-efficiency air conditioning, and rooftop greening. Renovated ROHM Kyoto Station Building. Started mass production of SiC Schottky Barrier Diodes. |
| 2011 |
Built 'Tsinghua ROHM Electronic Engineering Hall' at Tsinghua University. Established ROHM Semiconductor India Pvt. Ltd. |
| 2012 |
Developed the world's smallest '0402 size' Zener diode. Started mass production of full SiC power modules. |
| 2013 |
Held 'Kyoto International Music Student Festival '93'. Established ROHM Mechatech Philippines, Inc. Established ROHM Electronics (Malaysia) Sdn. Bhd. Established manufacturing-related companies in Tianjin. |
| 2014 |
Started newspaper serialization of 'ROHM-kun's New Museum Diary: Exploring Japanese Folktales'. Obtained ISO9001 certification. |
| 2015 |
Published CD-ROM 'ROHM-kun's Kyoto Museum Diary: Soundscape Report Edition'. Opened Second LSI Research Center. |
| 2016 |
Announced ROHM's proprietary ultra-high-speed pulse control technology (later named 'Nano Pulse Control™'). Opened 'ROHM Theatre Kyoto'. |
| 2017 |
Developed the world's first noise design-free automotive operational amplifier. |
| 2018 |
Obtained development process certification for automotive functional safety standard 'ISO26262'. Announced products equipped with power technology 'Nano' and ultra-low power consumption technology 'Nano Energy™'. |
| 2019 |
Obtained certification for automotive functional safety standard 'ISO26262'. Achieved the world's first certification for the international wireless communication standard Wi-SUN FAN. |
| 2020 |
Formulated the 'Management Vision'. Developed the 4th generation SiC MOSFET with industry-leading low ON resistance. |
| 2021 |
Formulated the mid-term management plan 'MOVING FORWARD to 2025'. Developed 'RoHM Group Environmental Vision 2050'. Donated the RoHM BNCT Center to Kyoto Prefectural University of Medicine. Joined the international initiative 'RE100'. |
| 2022 |
Reorganized domestic manufacturing subsidiaries into the front-end process 'RoHM Devices Manufacturing Co., Ltd.' and the back-end process 'RoHM Assembly Manufacturing Co., Ltd.'. Signed a collaboration agreement with Kyoto City to build a decarbonized society. Signed an agreement with Shiga Prefecture to connect people and forests. Joined the international initiative 'RE100'. |
