History
1937
April
Inoske Tomita, founder of Diamond Electric, started manufacturing and marketing automotive ignition coils as a personal business.
1940
June
Founded Tokushu Henatsuki K.K. in Nishi-Yodogawa ward (present Yodogawa ward), Osaka city
1948
March
All Diamond coil products were authorized as outstanding automotive parts by the Ministry of International Trade and Industry.
1960
July
Started the production of ignition trasformers for oil burners.
1962
May
Changed the company name to Diamond Electric Mfg. Co., Ltd.
1967
May
Founded Tottori Diamond Electric Mfg. Co., Ltd. in Tottori city (current Fuse Plant) .
1971
November
Developed and started manufacturing electronic ignition devices and combustion control devices for use in central heating systems.
1978
November
Capital participation by Osaka Small and Medium Business Investment Consultation Company (SBIC WEST JAPAN) .
1981
January
Constructed the Tsunoi Plant of Tottori Diamond Electric (current Tottori Plant) .
1984
September
Founded Niigata Diamond Electric Co.,Ltd. in Yoshida-machi, Nishikanbara-gun, Niigata Prefecture, as a joint venture with Uchida Mfg. Co., Ltd. (current Corona Corp.).
1985
December
Completed the second expansion engineering work of Tottori Diamond Electric and established the Thechnical Center.
1987
December
Founded Diamond Electric Mfg. Corporation (U.S.) in Michigan.
1989
September
Established the Headquarters Technical Center.
1989
November
Merged Tottori Diamond Electric Mfg. Co., Ltd. in preparation for listing.
1994
November
Awarded "Deming Prize for Medium and Small Companies" for our total quality control (TQC).
1996
July
Listed in Second Section of Osaka Securities Exchange.
1996
December
Acquired ISO9001 certification.
1996
December
Constructed the Second Plant of Diamond Electric Mfg. Corporation (U.S.) in West Virginia.
1997
July
Acquired QS9000 certification.
2000
September
Founded Diamond Electric Hungary Kft. in Esztergom, Hungary.
2001
January
Acquired ISO 14001 certification.
2003
December
Awarded "Award for TPM Excellence First Category".
2004
May
Founded Diamond Electric Mfg (Suzhou) Co.,Ltd.in Suzhou, China
2005
October
Acquired ISO14001/ TS16949 certification.
2006
November
Established a sales office in Hamamatsu.
2007
June
Founded DE Diamond Electric India Private Limited in Bawal, Haryana, India.
2009
July
Established a sales office in Yokohama
2010
February
Established our  Testing & Research Labo.
2010
April
Established our plant in Matsusaka, Mie.
2010
November
Founded Diamond Electric International Trading (Suzhou) Co.,Ltd. in Suzhou, China
2011
February
Established a sales office in Utsnomiya, Tochigi
2011
March
Founded Diamond Electric (Thailand) Co.,Ltd. in Thailand.
2012
February
Founded Diamond Electric Korea Co.,Ltd. in Seoul, Korea.
2013
May
Established a sales office in Toyota, Aichi.
2013
July
Founded PT. Diamond Electric Indonesia in Indonesia.
2014
November
Founded Diamond Business Co.,Ltd.
2014
December
Founded Diamond Electric Asia Pacific Co.,Ltd. in Thailand.
2015
January
Established a sales office in Kurume, Fukuoka.
2015
December
Founded LivLx Inc. as a joint venture with Headspring Inc.