|1975||Zenken Group established as a comprehensive education business|
|1976||Children's English Conversation School "World Academy" concept;
Completed branches in the Hokkaido, Tohoku, Chubu, Seibu, Chugoku and Shikoku regions
|1977||Started nationwide expansion of the Children's English Conversation School "World Academy"|
|1978||Launched the "University entrance exam challenge course";
Zenken entered the high school education field.
|1980||Started nationwide expansion of the Children's English Conversation School "Minerva Academy"|
|1981||Created teaching materials for high school entrance examination;
Began offering seminars for students preparing to take high school entrance examination
|1984||Acquired Junior Jump Academy from TBS-Britannica and started new nationwide expansion|
|1985||Released university entrance examination video course in partnership with the Eiken Foundation of Japan|
|1987||Opened Zenshin School and Zenshin Preparatory School, and started offering full range of classes mainly in the Tokyo metropolitan area.|
|1990||CAL established. Started computer software development business|
|1991||Started FP (Financial Planner) business through business alliance with DIAMOND, Inc.|
|1993||Became an "Excellent tax return corporation" certified company|
|1995||Became the largest shareholder in Ishii Precision Industry (Currently RYFETY) listed on the Second Section of the Tokyo Stock Exchange and added it to the Zenken Group;
Entered the finance business.
|1996||Became the largest shareholder of Linguaphone Japan;
Started English conversation school business for adults
|1997||Completed "Zenken Plaza" building located in front of Shinjuku Nishiguchi Station|
|2000||Full-scale entry into the Internet business;
Established Sosai Gakuin (currently Z-NET SCHOOL), a cram school for elementary and junior high school students that integrates full-time instructors and the Internet services; Established Zenken Planet and started accepting contracts for the IT (Information Technology) business of the Zenken Group
|2001||Established Zenken-All in September divisionalizing the children's English conversation business. Aimed to begin over-the-counter stock trading (listed on Heracles stock market in June 2005).|
|2004||Started study abroad placement business;
Appointed as the only agent for the American Collegiate Scholarship Association in Japan
|2006||Educational Technologies Limited became a member of the Zenken group. Entered the adult language training businesses;
Started health and beauty business (current e-marketing business).
Started developing a comprehensive internet marketing strategy (operating a commercial trading site in the health and beauty industry, developing a recruiting site, and creating and operating websites, among others).
Sunmarie became a member of the Zenken Group.
Started offering marriage partner introduction services.
AISE Japan, specializing in study abroad services for junior high and high school students, joined the Zenken Group.
|2007||English conversation business, language training business, study abroad placement business spun off as "Linguage Corporation."|
|2008||Established CHAMBER MEDIA. Started operating a support portal for small and medium-sized enterprises recommended by the Japan Chamber of Commerce and Industry|
|2010||Linguage obtained a "License for General Worker Dispatching Undertakings" from the Ministry of Health, Labour and Welfare|
|2011||Z-NET SCHOOL business spun off as Nobiru;
Established the Study Abroad Association
|2012||Established "Linguage Inc." in Cebu, Philippines, an overseas subsidiary corporation, to supply English conversation Skype lessons|
|2013||Started "Linguage Speak", a business offering English conversation Skype lessons|
|2014||Linguage obtained the Privacy Mark certification;
Nippon Steel Sumikin Intercom (currently Linguage Intercom) joined the Zenken Group; Opened the first Linguage English Conversation School classroom at the west exit of Shinjuku station
|2015||"Zenken Plaza II" building completed in Shinjuku, next to the "Zenken Plaza" building.
CHAMBER MEDIA Co., Ltd. organized a “Machicon” event for 10,000 people at the Tokyo Dome
|2017||AZ Japanese Service joined the Zenken Group;
Started Japanese language education business;
Opened Linguage Japanese Language School at the west exit of Shinjuku station
|2020||Head office relocated to Sumitomo Fudosan Shinjuku Central Park Tower in Nishi-Shinjuku, Shinjuku-ku, Tokyo.|