| 2022 | Transition to Prime Market under Tokyo Stock Exchange New Market Segments |
| January, 2019 | SUMIDA ELECTRIC (INDIA) PRIVATE LIMITED established in India. |
| June, 2018 | Acquired Pontiac Coil Inc. in the United States. |
| November, 2015 | A new plant established in Ji'an City, Jiangixi Province, PRC and the existing plant was extended. |
| October, 2015 | SUMIDA INSURANCE CORPORATION established in Federated States of Micronesia. |
| April, 2015 | Quang Ngai Plant (SUMIDA ELECTRONIC QUANG NGAI CO., LTD.) established in Vietnam. |
| February, 2014 | Sumida Power Technology Co., Ltd. established in Nagano, Japan. (Merged into Sumida Electric Co., Ltd. in 2020) |
| June, 2013 | SUMIDA Electronic SuQian Co., Ltd. established in SuQian City, JiangSu Province, PRC. |
| November, 2011 | Guangzhou Sumida Electric Co., Ltd. established in Guangzhou City, Guangdong Province, PRC. |
| July, 2010 | SUMIDA ELECTRIC (JI'AN) CO., LTD. established in Ji'an City, Jiangxi Province, PRC. |
| March, 2010 | SUMIDA ELECTRIC (CHANGDE) CO., LTD. established in Changde City, Hunan Province, PRC. |
| January, 2010 | SUMIDA ELECTRONIC VIETNAM CO., LTD. established in Haiphong City, Vietnam. |
| July, 2009 | Acquired Concord Electronics Industries with its subsidiary in Japan. |
| January, 2009 | Sumida Finance B. V. established in Netherlands. |
| October, 2008 | Acquired EIWA Co., Ltd with its subsidiaries and MOSTEC Inc. in Japan. |
| July, 2008 | SUMIDA ELECTRIC (GUANGXI) CO., LTD. established in Nanning City, Guangxi, PRC. |
| February, 2008 | PANTA ROMANIA S.R.L established in Romania. (Currently: SUMIDA FLEXIBLE CONNECTIONS ROMANIA S.R.L.) |
| August, 2007 | TAIWAN SUMIDA TRADING COMPANY LIMITED established in Taiwan. |
| September, 2006 | Acquired the majority stake stocks in Panta GmbH in Germany. (Currently: SUMIDA flexible connections GmbH) |
| SUMIDA TRADING (KOREA) COMPANY LIMITED established in Korea. | |
| February, 2006 | Acquired VOGT electronic AG with its subsidiaris in Germany by take over bid. (Currently: SUMIDA AG) |
| August, 2005 | Sumida Trading (SHANGHAI) Company Limited established in Shanghai, PRC. |
| April, 2005 | Sumida Electronic Components Co., Ltd. which controls existing business subsidiaries established. |
| December, 2004 | Sumida Holding Germany GmbH established in Germany (Currently: SUMIDA Europe GmbH) |
| Acquired STELCO GmbH in Germany. (Currently: SUMIDA Components GmbH) |
|
| April, 2003 | SUMIDA CORPORATION adopted the "Company with Committees" system in Japan. |
| July, 2000 | The Soma Technical Center was relocated to the Sendai Technical Center. (M-Laboratary was established) |
| June, 2000 | Company name changed to SUMIDA CORPORATION and changed from an operating holding company to a pure holding company. |
| SUMIDA CORPORATION listed on the First Section of the Tokyo Stock Exchange. | |
| August, 1999 | SUMIDA AMERICA HOLDING, INC. established in U.S.A. |
| December, 1998 | Sumida Electric Co., Ltd., listed on the Second Section of the Tokyo Stock Exchange. |
| October, 1998 | The head office moved to Chuo-ku, Tokyo. |
| October, 1995 | Sendai Technical Center established in Miyagi, Japan. (Currently: Sumida Electric Co., Ltd. M-Laboratory) |
| October, 1991 | Dongguan Sumida (Tai Ping) Electric Co., Ltd. established in China's Guangdong Province. |
| January, 1990 | Sumida Electric (U.S.A.) Co., Ltd. established in Chicago. |
| August, 1988 | Shares registered at the Japan Securities Dealers Association for over-the-counter trading. |
| July, 1987 | Hong Kong branch Established. (Currently: SUMIDA TRADING COMPANY LIMITED) |
| April, 1987 | Singapore branch established. (Currently: SUMIDA TRADING PTE LTD.) |
| December, 1985 | M. Sumida Electric Sdn. Bhd. was established in Malaysia. |
| October, 1984 | Sumida Electric (H.K.) Company Limited began outsourcing operations to Panyu Factory. |
| July, 1974 | Sumida Electric (H.K.) Company Limited established in Hong Kong. |
| October, 1969 | Taiwan Sumida Electronics Incorporated established in Taiwan. |
| October, 1966 | A manufacturing plant was incorporated in the city of Soma in Fukushima Prefecture. It was later renamed the Soma Technical Center. |
| June, 1963 | Company name changed Sumida Electric Co., Ltd. and the new head office building opened. |
| December, 1961 | The head office and factory moved to Kanamachi in Katsushika-ku, Tokyo. |
| January, 1956 | Sumida Electric Shokai was incorporated in Sumida-ku, Tokyo and renamed as Sumida Electric Manufacturing Co., Ltd. |
| May, 1950 | Ichiro Yawata, founder of Sumida, started Sumida Electric Shokai in Tokyo's Sumida ward. |