| 1915 |
1915年（大正4年）に古河合名会社が中心になった東京電化工業所を設立し、電解法による苛性ソーダを製造したのが始まりです。 |
| 1917 |
1917年（大正6年）に株式会社組織に改め、社名を旭電化工業株式会社としてスタートしました。 |
| 1917 |
Adeka was established to produce chlorine and caustic soda by salt electrolysis. |
| 1918 |
Completion of Ogu Plant, Tokyo. Commenced operations. |
| 1919 |
1919年（大正8年）に水素利用による硬化油の製造を開始して、ソーダと油脂の二本柱による化学工業への展開を確立するに至りました。 |
| 1919 |
Started the production of hydrogenated oil. |
| 1928 |
Separated an agrochemical manufacturing department and established NIHON NOHYAKU CO., LTD. |
| 1928-11 |
1928年11月設立 : 〒104-8386 : 東京都中央区京橋1-19-8 京橋OMビル : TEL 03-6361-1400 |
| 1929 |
Started the manufacture of RISU BRAND Margarine. |
| 1938 |
Established KANTO DENKA KOGYO CO., LTD. |
| 1947 |
Established YOKO SANGYO CO., LTD. for the purpose of selling our products. |
| 1947-01 |
1947年1月設立 : 〒101-0062 : 東京都千代田区神田駿河台2-5-12 NMF駿河台ビル5階 : TEL 03-3811-7191 |
| 1949 |
Listed its stock on the first section of the Tokyo Stock Exchange. |
| 1956-02 |
1956年2月設立 : 〒168-0063 : 東京都杉並区和泉1-33-9 : TEL 03-3323-8411 |
| 1959 |
Established TOKAI ELECTRO CHEMICAL CO., LTD. for the purpose of manufacturing and selling hydrogen peroxide products. |
| 1960 |
Established Kyokuyu Sangyo Co., Ltd. |
| 1961 |
Established KYOKUYU REAL ESTATE CO., LTD. |
| 1961-07 |
1961年7月設立 : 〒116-0014 : 東京都荒川区東日暮里5-48-5 光陽社ビル6階 : TEL 03-6743-1000 |
| 1962 |
Established ADEKA ARGUS INDUSTRY CO., LTD. for the purpose of manufacturing and selling plasticizers and stabilizers for plastics. |
| 1963 |
The trade name was changed to ADEKA ARGUS CHEMICAL CO., LTD. |
| 1965 |
Established ADEKA SWIFT CHEMICAL CO., LTD. as a joint venture with Swift of the US. |
| 1966 |
Akashi Plant in Hyogo completed. |
| 1967-10 |
1967年10月設立 : 〒103-0023 : 東京都中央区日本橋本町4-1-13 スリーピー日本橋ビル10階 : TEL 03-3231-1761 |
| 1968 |
Advanced into KASHIMA INDUSTRIAL COMPLEX. Participated in the establishment of KASHIMA CHLORINE & ALKALI CO., LTD., KASHIMA PVC MONOMER CO., LTD., KASHIMA SOUTH JOINT POWER CORP., and KASHIMA CHEMICAL CO., LTD. |
| 1969 |
Participated in the establishment of KANTO SODIUM SILICATE GLASS CO., LTD. and KASHIMA COMMON FACILITIES Co., Ltd. |
| 1970 |
Completed Kashima Plant, Ibaraki. |
| 1973 |
Established ADEKA CLEAN AID CORP. for the purpose of selling industrial detergent. |
| 1973-04 |
1973年4月設立 : 〒101-0062 : 東京都千代田区神田駿河台2-5-12 NMF駿河台ビル2階 : TEL 03-3816-1271 |
| 1974-06 |
1974年6月設立 : 〒103-0001 : 東京都中央区日本橋小伝馬町14-4 岡谷ビル : TEL 03-3808-2281 |
| 1975 |
Completed AS Kasei CO., LTD. Sodegaura Plant, Chiba. (Now, known as Chiba Plant) |
| 1977 |
Established ACR CO., LTD. and TOKYO ENVIRONMENTAL MEASUREMENT CENTER CO., LTD. |
| 1977-09 |
1977年9月設立 : 〒116-0012 : 東京都荒川区東尾久8-5-2 : TEL 03-3895-1141 |
| 1978 |
Established CO-OP CLEAN CO., LTD. |
| 1979 |
Kuki Plant completed. (closed in 1996) |
| 1979-02 |
1979年2月設立 : 〒104-0033 : 東京都中央区新川1-25-9 新川シティビル1階 : TEL 03-6275-2391 |
| 1979-07 |
1979年7月設立 : 〒537-0024 : 大阪府大阪市東成区東小橋1-11-10 : TEL 06-6977-6655 |
| 1985 |
Participated in the establishment of MIZUSHIMA PLASTICIZER CO., LTD. for the purpose of manufacturing special plasticizer. |
| 1988 |
Established ASAHI DENKA（SINGAPORE）PTE.LTD. in Singapore. (now changed company name to ADEKA（SINGAPORE）PTE.LTD.) |
| 1989 |
Established CHANG CHIANG CHEMICAL CO., LTD. in Taiwan for the purpose of manufacturing and selling plastic additives. |
| 1989-06 |
1989年6月設立 : （連絡先） : 〒964-0981 : 福島県二本松市平石高田4-286 : TEL 0243-23-7715 |
| 1990 |
Acquired capital in NIHON EPOXY RESIN CO., LTD. for the purpose of manufacturing epoxy resin. |
| 1990-08 |
1990年8月設立 : （連絡先） : 〒104-0031 : 東京都中央区京橋3-12-2 京橋第2有楽ビル : TEL 03-6361-1429 |
| 1991 |
Established HAN-NONG ADEKA Co.,Ltd. in Korea (in 1997, the name was changed to DONGBU ADEKA Co.,Ltd.) as an overseas base for manufacturing plastic additives. |
| 1993-04 |
1993年4月設立 : 〒116-0014 : 東京都荒川区東日暮里5-48-5 光陽社ビル : TEL 03-3805-7484 |
| 1994 |
Established AMFINE CHEMICALS CORP. in the US. |
| 1994-03 |
1994年3月設立 : 〒684-0046 : 鳥取県境港市竹内団地207 : TEL 0859-45-4771 |
| 1995 |
Completed Soma Plant (the first period) and started operation. |
| 1996 |
Took over the operations of epoxy business of ACR CO., LTD. |
| 1996-03 |
1996年3月設立 : 〒116-0014 : 東京都荒川区東日暮里5-48-5 光陽社ビル 2・5階 : TEL 03-3805-7451 |
| 1998 |
Established an European office in Germany. (incorporated as an overseas affiliated company in 1999) |
| 1999 |
Completed the new building of R&D Laboratory. (Ogu District) |
| 1999-01 |
1999年1月設立 : 〒116-0002 : 東京都荒川区荒川1-49-1 荒川第10秦ビル２階 : TEL 03-6458-3050 |
| 2000 |
Established ASAHI DENKA KOREA CORP. in South Korea. (now changed company name to ADEKA KOREA CORP.) |
| 2000-04 |
2000年4月設立 : 〒116-0014 : 東京都荒川区東日暮里5-48-5 光陽社ビル4階 : TEL 03-3807-8161 |
| 2000-04 |
2000年4月設立 : 〒101-0048 : 東京都千代田区神田司町2-6 アーバンセンター神田司町3階 : TEL 03-4455-2398 |
| 2001 |
Acquired YONGO Co.,ltd. from JAPAN TOBACCO INC. and reorganized it as a subsidiary. |
| 2001-08 |
2001年8月設立 |
| 2002 |
Established KUKDO CHEMICAL （KUNSHAN） CO., LTD. in China jointly with a Korean company KUKDO CHEMICAL CO., LTD. |
| 2003 |
The subsidiary DONGBU ADEKA CORP. changed its trade name to ADEKA FINE CHEMICAL KOREA CORP. |
| 2004 |
Established CHANG CHIANG CHEMICAL (SHANGHAI) CO., LTD. in China. |
| 2005 |
Completed the Tainan Plant of ADEKA FINE CHEMICAL TAIWAN CORP. |
| 2005 |
Completed a plant of ADEKA FOODS (CHANGSHU) CO., LTD., a subsidiary in China for manufacturing and selling foods. |
| 2005 |
Acquired shares of UEHARA FOODS INDUSTRY CO., LTD., a food manufacture and distributor, and reorganized it as a subsidiary. |
| 2006 |
マヨネーズ、ドレッシング類の製造を目的にアサヒ・ファインフーズ（株）を設立（2006年 ADEKAファインフーズ（株）に商号変更） |
| 2006 |
ドイツにASAHI DENKA Europe GmbHを設立（2006年 ADEKA Europe GmbHに商号変更） |
| 2006 |
アデカ物流（株）設立（2006年 ADEKA物流（株）に商号変更） |
| 2006 |
食品加工油脂、製菓・製パンその他食品原材料の販売を目的として、旭食品販売（株）を設立（2006年 ADEKA食品販売（株）に商号変更） |
| 2006 |
中国に阿洒旭電化（上海）有限公司を設立（2006年 艾迪科（上海）貿易有限公司に商号変更） |
| 2006 |
中国に阿洒旭精細化工（上海）有限公司を設立（2006年 艾迪科精細化工（上海）有限公司に商号変更） |
| 2006 |
シンガポールにASAHI DENKA（ASIA）PTE.LTD.を設立（2006年 ADEKA（ASIA）PTE.LTD.に商号変更） |
| 2006 |
米国にASAHI DENKA USA, INC.を設立（2006年 ADEKA USA CORP.に商号変更） |
| 2006 |
中国に阿洒旭食品（常熟）有限公司を設立（2006年 艾迪科食品（常熟）有限公司に商号変更） |
| 2006 |
The trade name was changed to ADEKA CHEMICAL SUPPLY CORP. in 2006. |
| 2006 |
The trade name was changed to ADEKA LIFE-CREATE CORP. in 2006. |
| 2006 |
Changed company name from ASAHI DENKA CO., LTD. to ADEKA CORP.. : Moved headquarters to a new buildingin Higashi-ogu, Arakawa-ku, Tokyo from Nihonbashi,Chuo-ku. |
| 2007 |
ADEKA INDIA PVT. LTD. established in India. |
| 2007-05 |
2007年5月設立 |
| 2008 |
ADEKA FINE CHEMICAL KOREA CORP. merged with ADEKA KOREA CORP. under the name of ADEKA KOREA CORP. |
| 2010 |
ADEKA KOREA CORP. established R&D center in Korea. |
| 2011 |
ADEKA and Al GHURAIR PETROCHEMICALS LLC established ADEKA Al GHURAIR ADDITIVES LLC, a joint venture company in UAE. |
| 2012 |
AMFINE CHEMICAL CORP. in the USA established AM STABILIZERS CORP. for the purpose of manufacturing and selling vinyl chloride stabilizer in the USA. |
| 2012 |
AM STABILIZERS CORP acquired a vinyl chloride stabilizer business (HALSTAB DIVISION) from American company Hammond Group Inc. |
| 2012 |
Established ADEKA BRASIL LTDA. in Brazil. |
| 2012 |
Established ADEKA FOODS （ASIA） SDN.BHD. in Malaysia. |
| 2012 |
Withdrew investment from KASHIMA CHLORINE & ALKALI CO., LTD., KASHIMA PVC MONOMER CO., LTD., and KASHIMA CHEMICAL CO., LTD. |
| 2013 |
Completed new building of Urawa R&D Laboratory. |
| 2013 |
Established "Basic Policy against Corruption" and "Social Media Policy" of ADEKA Group. |
| 2014 |
ADEKA FOODS (ASIA) SDN. BHD. acquired Halal certification from government agency of Malaysia. |
| 2015 |
ADEKA FOODS (ASIA) SDN. BHD. acquired HACCP certification from Ministry of Health of Malaysia. |
| 2016 |
The structure of ADEKA (SHANGHAI) CO., LTD. was transformed into an investment corporation and renamed as ADEKA (CHINA) CO., LTD.. |
| 2016 |
Acquired shares of CROWN CO., LTD. and reorganized it as a subsidiary. |
| 2016 |
Established a representative office in Ho Chi Minh City, Vietnam for the purpose of market surveys for chemical and food products. |
| 2016 |
Acquired shares of SHOWA KOSAN CO., LTD. and reorganized it as an equity method affiliate. |
| 2016 |
Formulated "Action Plan to Promote Success of Women in the Workplace." |
| 2017 |
ADEKA （CHINA） CO., LTD. established ADEKA FINE CHEMICAL (Zhejiang) Co., LTD. in China for the purpose of manufacturing and selling chemical products such as polymer additives. |
| 2018 |
NIHON NOHYAKU CO., LTD. became a consolidated subsidiary. |
| 2019 |
Mohammed Al Otaiba Group acquires shares of ADEKA AL GHURAIR ADDITIVES LLC and changes its name to ADEKA AL OTAIBA MIDDLE EAST LLC. |
| 2022 |
Dissolved the joint venture, KANTO SODIUM SILICATE GLASS CO., LTD. |
| 2023 |
Acquired shares of Incubation Alliance, Inc. |
| 2023 |
Made YONGO CO.,LTD. wholly owned subsidiary through simplified share exchange. |
| 2024 |
Merger conducted with ADEKA FOODS SALES CORPORATION being the surviving company and CROWN CO.,LTD. and YONGO CO.,LTD. being the merged companies |
| 2025 |
Transfer of ADEKA FINE CHEMICAL (SHANGHAI) CO., LTD.'s shareholding. |
| 2025 |
Transfer all shares of UEHARA FOOD INDUSTRY CO.,LTD. |
