| 1946年04月 |
The late Hideto Furuoka found Gakusyu Kenkyusha with the conviction that education is the key to Japan's postwar reconstruction |
| 1947年03月 |
Gakusyu Kenkyusha is reorganized and incorporated as Gakken Co., Ltd. |
| 1947年09月 |
Direct distribution began; direct-to-school sales system initiated |
| 1962年04月 |
New Gakken company headquarters was built at Kami-ikedai, Ota-ku, Tokyo |
| 1964年12月 |
Gakken 2nd building was built at Naka-ikegami, Ota-ku, Tokyo |
| 1966年11月 |
Rippu Shobo Publishing Co., Ltd. was established to handle publishing business |
| 1971年07月 |
Bookshop sales promotion team (Selector System) was established |
| 1972年10月 |
Shift to direct in home sales system using educational companions |
| 1975年09月 |
Shujunsha Co., Ltd. (now Gakken Medical Shujunsha Co., Ltd.) was established to publish medical materials |
| 1979年05月 |
Gakken educational magazines‘; Gakusyu (Learning)' and‘ Kagaku (Science)' circulation reached 6.7 million copies |
| 1982年08月 |
Gakken Co., Ltd. was listed in the second section of the Tokyo Stock Exchange with capital of 2.0 billion yen |
| 1984年02月 |
Gakken Co., Ltd. was listed in the first section of the Tokyo Stock Exchange with capital of 5.6 billion yen |
| 1985年02月 |
Gakken Medicom Co., Ltd. (now Gakken E-Mirai Co., Ltd.) was established to handle online information services |
| 1986年05月 |
Gakken 3rd building was built in Nishi-gotanda, Shinagawa-ku, Tokyo |
| 1987年03月 |
Trading company Gakken (Hong Kong) Co., Ltd. was established |
| 1988年05月 |
PlatzArtist Co., Ltd. was established to create audio products and manage copyrights |
| 1992年10月 |
Gakken Logistics Co., Ltd. was established to handle logistics systems |
| 1994年04月 |
Gakken Toy Hobby Co., Ltd. (now Gakken Sta:Ful Co., Ltd.) was established to produce and sell stationery |
| 2004年07月 |
Gakken Cocofump Co.,Ltd. (now Gakken Cocofump Holdings Co., Ltd.) was established to handle nursing care |
| 2004年07月 |
Acquisition of Rippu Shobo Publishing Co., Ltd. |
| 2005年02月 |
Gakken R&C Co., Ltd. (now GAKKEN DATA SERVICE Co., Ltd.) was established to handle third-party evaluations |
| 2005年11月 |
Gakken Method Co., Ltd. was established as a cram school management company |
| 2006年11月 |
Gakken Area Market Co., Ltd. was established to handle the sales of picture books and preschool products for kindergartens and nursery schools |
| 2006年12月 |
The cram school management company Tohoku Best Study Co., Ltd. (now Gakken Study et Co., Ltd.) became a subsidiary of Gakken by M&A |
| 2007年03月 |
The cram school management company Turtle Study Staff Co., Ltd. (now Gakken L Staffing Co., Ltd.) , a major player in the private tutor business became a subsidiary of Gakken by M&A |
| 2007年03月 |
Turtle Study Staff Co., Ltd. (now Gakken L Staffing Co., Ltd.) , a major player in the private tutor business became a subsidiary of Gakken by M&A |
| 2007年12月 |
The cram school management company Hotline Co., Ltd. (now Gakken AIZ Co., Ltd.) became a subsidiary of Gakken by M&A |
| 2008年02月 |
The cram school management company Shubunsha Co., Ltd. (now Gakken Study et Co., Ltd.) and WASEDA SINGAPORE PTE.LTD. became a subsidiary of Gakken by M&A |
| 2008年05月 |
Gakken Cocofump Co.,Ltd., Gakken Cocofump Nursery Co.,Ltd. and Gakken Cocofump Staff Co.,Ltd. were established |
| 2008年08月 |
All Gakken offices were moved to Nishi-gotanda Shinagawa-ku in Tokyo to consolidate all businesses |
| 2008年09月 |
JV publishing Company Beijing Zhongqing Gakken Jiaoyu Keji Fazhan Co., Ltd. was established in China |
| 2009年01月 |
The cram school management company Waseda School Co., Ltd. became a subsidiary of Gakken by M&A |
| 2009年01月 |
The cram school management company Sozogakuen Co., Ltd. became a subsidiary of Gakken by M&A |
| 2009年01月 |
Nursery and school business company Gakken E-mirai Co., Ltd. was established |
| 2009年02月 |
Gakken inherited business from Aim Co., Ltd. and established new company called Fukushima best study Co., Ltd. |
| 2009年10月 |
Gakken Co., Ltd. became a holding company and changed name to Gakken Holdings Co., Ltd. Then, Gakken Educational Co., Ltd. , Gakken : Publishing Co., Ltd. , Gakken Education Publishing Co., Ltd. , Gakken Marketing Co., Ltd. , Gakken Shuppan Service Co., Ltd. and Gakken : Products Support Co., Ltd. were established through incorporation-type company split. In the same time, Gakken E-mirai Co., Ltd., Gakken Next Co., Ltd. and Gakken Medical Shujunsha Co., Ltd. became successor companies in absorption-type company split |
| 2010年04月 |
Intermediate holding company Gakken Juku Holdings Co., Ltd. was established |
| 2010年07月 |
Intermediate holding company Gakken Shuppan Holdings Co., Ltd. was established |
| 2010年10月 |
Gakken R&C Co., Ltd. acquired Gakken Data Service Co., Ltd. and changed name to Gakken Data Service Co., Ltd. |
| 2011年04月 |
Gakken Nursing Support Co., Ltd. was established to distribute medical and nursing care contents |
| 2012年06月 |
Gakken SmileHeart Co., Ltd. was established to promote employment of persons with disabilities |
| 2012年09月 |
Advertising company Shanghai Gakken Advertising Co., Ltd. was established in China |
| 2012年09月 |
You-Me-Care Co., Ltd., a company which operates elderly care facilities, became a subsidiary of Gakken by M&A |
| 2012年10月 |
Fukuoka Yoikono Gakushusha Co., Ltd., a company which sells learning materials, became a subsidiary of Gakken by M&A |
| 2013年01月 |
ING Co. , Ltd., a cram school management company, became a subsidiary of Gakken by M&A |
| 2013年01月 |
ING Co., Ltd., a cram school management company, became a subsidiary of Gakken by M&A |
| 2013年05月 |
Gakken Juku Holdings Co., Ltd., made joint venture with ICHISHIN HOLDINGS Co., Ltd. and established GI Village Co., Ltd. to manage children’s day care center. |
| 2013年06月 |
Gakken representative offices were established in Singapore and Malaysia (Kuala Lumpur) |
| 2013年08月 |
The cram school management company ZENKYOKEN Co., Ltd. became a subsidiary of Gakken by M&A |
| 2013年10月 |
Digital publishing business company BOOK BEYOND Co., Ltd. was established |
| 2014年10月 |
Facility design and development company SPA Co., Ltd.(now SYSCARE Co., Ltd.) became a subsidiary of Gakken by M&A |
| 2014年10月 |
ICT education business company Gakken Educational ICT Co., Ltd. was established |
| 2014年10月 |
Gakken Nursing Support Co., Ltd. changed name to Gakken Medical Support Co., Ltd. |
| 2015年03月 |
Study-aid books publishing and selling company BUNRI Co., Ltd. became a subsidiary of Gakken by M&A |
| 2015年05月 |
SYSCARE Co., Ltd. acquired SPA Co., Ltd. |
| 2015年07月 |
Gakken Holdings Co., Ltd. made joint venture with A.C.E Group of Companies, a Myanmar IT business group, and established Gakken Ace Education Co., Ltd., a classroom business company in Myanmar |
| 2015年07月 |
Gakken Medical Shujunsha Co., Ltd. made joint venture with PT.EDUHEALTH TEKNOLOGI INDONESIA and established PT.GAKKEN HEALTH AND EDUCATION INDONESIA, a company for medical promotion business in Indonesia |
| 2015年10月 |
Gakken Marketing Co., Ltd. merged with Gakken Education Publishing Co., Ltd. and Gakken Publishing Co., Ltd. then changed name to Gakken Plus Co., Ltd. |
| 2015年10月 |
Gakken Medicom Co., Ltd. merged with Gakken Next Co., Ltd. , inherited educational development business from Gakken E-mirai Co., Ltd. and Gakken Education Publishing Co., Ltd., then changed name to Gakken Associe Co., Ltd. |
| 2015年10月 |
A business incubator company, Gakken Innovation Co., Ltd. was established |
| 2015年10月 |
Gakken Asia Pacific Pte.Ltd. was established as headquarters in Singapore, in order to integrate Gakken’s businesses in Asia. |
| 2015年10月 |
Gakken Cocofump Co.,Ltd. acquired You-Me-Care Co., Ltd. |
| 2015年10月 |
Gakken Cocofump Holdings Co., Ltd. made joint venture with Human Life Management Co., Ltd., and established Gakken Cocofump Nursing Co., Ltd. , a home-visit nursing business company |
| 2015年10月 |
Turtle Study Staff Co., Ltd. changed name to Gakken L Staffing Co., Ltd. |
| 2015年12月 |
Gakken Education Malaysia Sdn.Bhd., a company for classroom business in Malaysia was established |
| 2016年02月 |
Shubunsha Co. , Ltd. changed name to Gakken Study et Co., Ltd. |
| 2016年04月 |
Gakken Study et Co., Ltd. acquired Tohoku Best Study Co., Ltd. |
| 2016年06月 |
Gakken Holdings Co., Ltd. made joint venture with Nanmee Group, and established Gakken Nanmeebooks Education Co., Ltd., a classroom business company in Thailand |
| 2016年10月 |
Gakken Study et Co., Ltd. established SIGN -1 Co., Ltd., a learning center business company in Saitama prefecture |
| 2016年11月 |
College preparatory school management company Koshinsha Co., Ltd. and Koto Shingakujuku became a subsidiary of Gakken by M&A. |
| 2016年11月 |
Gakken Plus Co., Ltd. invested in the online English business company Glats. Co., Ltd. |
| 2017年02月 |
TOKYO GLOBAL GATEWAY Co., Ltd., a company for planning, developing and managing education center for nurturing global human resources was established |
| 2017年05月 |
Gakken acquired additional shares of Ichishin Holdings. Ichishin Holdings becomes an affiliate accounted for the equity method. |
| 2017年10月 |
Gakken Plus co.,Ltd. merged with BOOK BEYOND Co., Ltd. and Gakken Educational ICT Co., Ltd. |
| 2017年11月 |
Cram school management company, Bunri Gakuin Co., Ltd. became a subsidiary of Gakken by M&A. |
| 2017年11月 |
Beacon Co., Ltd. established for planning and producing various assessments |
| 2017年11月 |
JTEX Management Center Co., Ltd. , a company for dispatching instructors to client companies, became a subsidiary of Gakken by M&A. |
| 2018年09月 |
Elderly care service company, Medical Care Service Co., Ltd., became a subsidiary of Gakken by M&A. |
| 2018年10月 |
Gakken E-Mirai Co., Ltd. merged with Gakken Innovation Co., Ltd. and transferred the recruitment support operations from Gakken Associe Co., Ltd. |
| 2018年10月 |
Koto Shingakujuku Co., Ltd. acquired Koshin Co., Ltd. |
| 2018年10月 |
「(株)学研教育みらい」が「(株)学研イノベーション」を吸収合併するとともに、「(株)学研アソシエ」より採用支援事業を移管 |
| 2018年10月 |
「(株)高等進学塾」が「(株)コーシン」を吸収合併 |
| 2018年12月 |
Hisho Bunkyo Co., Ltd.,a learning center in Taiwan became a subsidiary of Gakken Study et by M&A. |
| 2018年12月 |
「(株)学研スタディエ」が台湾の学習塾「飛翔文教股份有限公司」をM&Aにより子会社化 |
| 2019年01月 |
Gakken Plus Co., Ltd. acquired Gakken Shuppan Holdings Co., Ltd. |
| 2019年01月 |
「(株)学研プラス」が「(株)学研出版ホールディングス」を吸収合併 |
| 2019年04月 |
GAKKEN STUDY ET VIETNAM CO.,LTD. established in Vietnam by Gakken Study et Co., Ltd. for Japanese students living in Vietnam. |
| 2019年09月 |
IC Net Co., Ltd, a company implements official development assistance projects became a subsidiary of Gakken by M&A. |
| 2019年09月 |
コンサルティング事業の「アイ・シー・ネット(株)」をM&Aにより子会社化 |
| 2019年10月 |
Gakken E-Mirai Co., Ltd. acquired Gakken Associe Co., Ltd. |
| 2019年10月 |
「(株)学研教育みらい」が「(株)学研アソシエ」を吸収合併 |
| 2020年10月 |
Gakken Area Market Co., Ltd. acquired Fukuoka Yoikono Gakushusha Co., Ltd. |
| 2020年12月 |
Arukikata. Co.,Ltd. was established. |
| 2021年12月 |
Establishment of Gakken LEAP Co.,Ltd. |
| 2022年04月 |
Gakken Holdings Co., Ltd. listed as one of the Prime Market Companies of the Tokyo Stock Exchange. |
| 2022年04月 |
東証新市場区分 プライム市場に移行 |
| 2022年10月 |
Gakken E-Mirai Co., Ltd. merged with Gakken Plus Co., Ltd., Gakken Medical Shujunsha Co., Ltd., and Gakken Shuppan Service Co., Ltd. and changed its name to Gakken Inc. |
| 2022年10月 |
(株)学研教育みらいが㈱学研プラス、(株)学研メディカル秀潤社及び(株)学研出版サービスの３社を吸収合併し、商号を(株)Gakkenに変更 |
| 2023年04月 |
Acquisition of shares of DTP Education Solutions JSC. |
| 2023年04月 |
DTP Education Solutions JSCの株式を取得（現持分法適用関連会社） |
| 2023年05月 |
NE Holdings Co., Ltd. joined as Gakken Group affiliates. |
| 2023年05月 |
(株)エヌイーホールディングスを買収（現連結子会社） |
| 2023年07月 |
ICHISHIN HOLDINGS Co., Ltd. joined as Gakken Group affiliates. |
| 2023年07月 |
(株)市進ホールディングスを連結子会社化 |
| 2023年11月 |
Grand Uni Life Care Service Co., Ltd. joined as Gakken Group affiliates. |
| 2023年11月 |
(株)グランユニライフケアサービスを買収（現連結子会社） |
| 2024年09月 |
Kirihara Shoten K.K. joined as Gakken Group affiliates. |
| 2024年09月 |
(株)桐原書店を買収（現連結子会社） |
| 2024年10月 |
(株)学研エリアマーケットが、(株)Gakkenの一部事業を吸収分割し、商号を㈱Gakken SEEDに変更 |
