| 1946 |
Founded Gakken Co., Ltd |
| 1947 |
Gakusyu Kenkyusha incorporated and reorganized as a corporation |
| 1980 |
Gakken Classrooms open classrooms for arithmetic, mathematics, and Japanese |
| 1984 |
Company listed in the first section of the Tokyo Stock Exchange |
| 1986 |
Gakken Classrooms begin English instruction for junior high school students |
| 1988 |
Gakken CAI Schools begin instruction |
| 2000 |
Gakken Withnet placement business for private tutors established |
| 2002 |
Gakken Classrooms offer Science Experiment Classrooms |
| 2004 |
Gakken Correspondence Courses in Science and Social Studies offered |
| 2005 |
Established Gakken Methods
Gakken Correspondence Course in Writing and Composition offered |
| Jun.2006 |
ANCES, Inc. (Tokyo Gakuen) and ANCES Child Educational Institute become wholly-owned subsidiaries. The combined company, Gakken Quest, is established on October 1. |
| Dec.2006 |
Tohoku Best Studies Co., Ltd. (Asunaro Gakuin) become wholly-owned subsidiaries. |
| Mar.2007 |
Capital and business alliance formed with Turtle Study Staff Co., Ltd.(Gakken's home teachers) begin instruction |
| Apr.2007 |
Net Gakken Classrooms begin instruction
Gakken Correspondence "New Directions" Course offered |
| May.2007 |
Company acquires 100% of Showa Gakkan (Showa Co., Ltd.). Name changed to Gakken Seminar Co., Ltd. |
| Jul.2007 |
Gakken Classrooms/ Z-Kai Course begin instruction |
| Dec.2007 |
Capital alliance formed with HOT LINE, Inc. Business resumes as Aizu Preparatory Schools |
| Feb.2008 |
Business alliance formed with WASEDA ACADEMY CO., Ltd (business alliance continues with SHUBUNSHA, CO., Ltd.) |
| Mar.2008 |
SHUBUNSHA, CO., Ltd. and WASEDA SINGAPORE PTE.Ltd become wholly-owned subsidiaries. |
| Aug.2008 |
Gakken Building moved
Capital and business alliance formed with Meiko Network Japan Co., Ltd. |
| Jan.2009 |
Capital and business alliance formed with Waseda School Co., Ltd. and Sozo Gakuen Co., Ltd. |
| Feb.2009 |
Business transfer from EIM Co., Ltd. (Taishi Seminar), Fukushima Best Study Co., Ltd. established |
| Oct.2009 |
Gakken Co., Ltd becomes a holding company. Name changed to Gakken Holdings Co., Ltd. Established Gakken Educational Co., Ltd. to take in charge of Gakken Group's educational and preparatory school businesses. |