| July 1985 | Nihon Kyoiku Kosha founded in Shinjuku, Tokyo. The classroom launched under the name "Riso Kyoiku Kenkyujo." Each class limited to six students, with the aim of providing a responsible teaching system conducted entirely by full-time instructors. |
|---|---|
| April 1989 | Head Office moved to Mejiro 3-14-3, Toshima, Tokyo. |
| May 1989 | Meimonkai Home Teacher Dispatch Center established. Launch of one-on-one instruction by a team of professional teachers, distinct from student instructors. Mejiro School opened (Tokyo). |
| March 1990 | Developed unique "One-on-one, individual booth teaching system" and name changed to "Tokyo man to man school." Shin-Nakano School opened (Tokyo). |
| January 1997 | The nickname for "Tokyo man to man school" was officially named "TOMAS". Opened the Kawasaki School, expanding into Kanagawa Prefecture. |
| August 1997 | Opened the Tokorozawa School, expanding into Saitama Prefecture. |
| October 1998 | Trade name changed to Riso Kyoiku Co., Ltd. |
| December 1998 | Registered as an OTC Company by the Tokyo Stock Exchange. |
| March 2000 | Decided on "TOMAS" as the nickname for "Tokyo man to man school." |
| July 2000 | Nihon Edunet Co., Ltd. established with the aim of providing fully individualized instruction through real-time, interactive use of the Internet. |
| March 2001 | Listed on the 2nd Section of the Tokyo Stock Exchange. |
| January 2002 | Head Office moved to Mejiro 3-1-40, Toshima, Tokyo. |
| June 2002 | Listed on the 1st Section of the Tokyo Stock Exchange. |
| September 2002 | Meimonkai home teacher dispatch center HQ established in Kanagawa. Meimonkai Yokohama-Ekimae School opened. |
| November 2002 | Meimonkai home teacher dispatch center regional office opened in Chiba prefecture. |
| December 2002 | Meimonkai home teacher dispatch center regional office opened in Saitama Chiba prefecture. School Tour Ship Co., Ltd. established. |
| January 2003 | Meimonkai Co., Ltd. split off as a separate company. Shingakai Co., Ltd. Formed |
| July 2005 | School Tour Ship Co., Ltd. trade name changed to Riso Kyoiku Kikaku Co., Ltd. |
| August 2011 | Our early childhood education division, Shingakai, opened "Shinga's Club Gakudo," a long-hours after-school care program to fully support children from busy families. |
| December 2011 | Shingakai launched "Shinga's Club Takuji," an academically-focused, long-hours childcare service designed to assist working mothers by preparing their children for elementary school admissions through a personalized educational curriculum. |
| September 2012 | Launched "Medic TOMAS," a one-on-one tutoring service specializing in medical school entrance exams. |
| October 2013 | Inter TOMAS Co., Ltd. split off as a separate company. Plus One Kyoiku Co., Ltd. split off as a separate company. Nihon Edunet Co., Ltd. trade name changed to School TOMAS Co., Ltd. Riso Kyoiku Kikaku Co., Ltd. trade name changed to TOMAS Kikaku Co., Ltd. |
| July 2019 | Formed a capital and business alliance with Surugadai Gakuen Educational Institute. |
| September 2019 | Joint company established with Sundai Gakuen to form Sundai TOMAS Co., Ltd. |
| February 2020 | Sundai TOMAS established "Spec.TOMAS" Co., Ltd. Inter TOMAS Co., Ltd. and TOMAS Kikaku Co., Ltd. merged back into Riso Kyoiku Co., Ltd. |
| August 2020 | Cocokara Teachers Co., Ltd. established. |
| September 2020 | Formed a capital and business alliance with Hulic Co., Ltd. (TSE: 3003). Formed a three-party business alliance with Hulic Co., Ltd. and Konami Sports Co., Ltd. |
| April 2021 | Entered into a business alliance with Konami Sports Co., Ltd. |
| March 2022 | Entered into a business alliance with Shingakai Co., Ltd., Kids Smile Holdings Inc., and Kids Smile Project Co., Ltd. |
| April 2022 | Transitioned to the Prime Market of the Tokyo Stock Exchange. |
| May 2024 | Became a consolidated subsidiary of Hulic Co., Ltd. through a tender offer and a third-party allotment of new shares. |
| September 2025 | We transitioned to a holding company structure and changed our trade name to Riso Kyoiku Group Co., Ltd. |
| 1990 | (November)Nerima School |
|---|---|
| 1992 | (April)Mitaka School |
| 1993 | (April)Asagaya School(September) Sugamo School(December) OizumiGakuen School |
| 1994 | (April)Chitose-Funabashi School (August)Narimasu School |
| 1995 | (January)Sangenjaya School (July)Ikebukuro School (November)SasazukaSchool |
| 1996 |
(January)Chofu School (March)Tachikawa School (April)Nakano School (May)Shibuya School (August)Fuchu School (October)Tama Center School |
| 1997 | (January)KawasakiSchool (March)Jiyugaoka School (June)Omori School (August)Tokorozawa School |
| 1998 | (February)Shin-Yurigaoka School (June)Minami-Urawa School (November)Ogikubo School |
| 1999 |
(February)Tama Plaza School (May)Kokubunji School (August)AobadaiSchool (November)Seijo Gakuen School |
| 2000 | (January)Takadanobaba School (September)Hiyoshi School (November)Machida School |
| 2001 | (March)Tokiwadai School (August)Matsudo School (November)Omiya School |
| 2002 | (April)Kawaguchi School (August)Tsurumi School (November)HibarigaokaSchool |
| 2003 | (May)Chitose-Karasuyama School (August)Shimo-Kitazawa School (November)Shiki School |
| 2004 |
(January)Azabu School (February)Hachioji School (August)IidabashiSchool (November)Kashiwa School (December)Shin-Urayasu School |
| 2005 | (March)Yokohama School (July)Center Minami School (October)Oji School |
| 2006 |
(February)Higashi Totsuka School (April)Shinjuku School (December)Seiseki-Sakuragaoka School Kamiooka School |
| 2007 | (April)AkabaneSchool (July)Moto-Yawata School (August)Fujisawa School |
| 2008 | (September)Hon-Atsugi School |
| 2009 | (February)Futako-Tamagawa School (October)Nishi-Nippori School |
| 2010 |
(January)Monzen-Nakacho School (May)Musashi-Kosugi School (August)MeguroSchool (December)Kamata School |
| 2011 | （July)Kita-Urawa School (October)Tanashi Kasai School |
| 2012 | (May)Myogadani School (July)Tsudanuma School (September)Ichigaya School |
| 2013 | (January)Kinshicho School (June)Kawagoe School (November)Chiba School |
| 2016 | (February)Minami-Osawa School (March)YotsuyaSchool (June)Tamachi School |
| 2017 |
(March)Togoshi School Center Kita School Kunictachi School Asakusabashi School (June)Mukogaoka-Yuen School Totsuka School (September)MusashiSakai School Medic TOMAS Yokohama School |
| 2018 |
(March)Hakusan School OsakiSchool Kichijoji School Shakujii-Koen School Ichikawa School Tsunashima School (October)Kaihimmakuhari SchoolShimo-Takaido School |
| 2019 | (January)Sakura-Shinmachi School (May)Gakugei-Daigaku School (June)Tama Center School |
| 2020 | (May)Gakugei Daigaku School (June)Tama Center School (September)Miyazakidai School |
| 2021 | (February)Medic TOMAS Omiya School (March)Ageo School Medic TOMAS Kichijoji School (May)Ofuna School (July)Tsukishima School Nagareyama-Otakanomori School |
| 2022 | (March)Futamatagawa School Hamadayama School Oyamadai School |
| 2023 | (January)Ebina School (February)Oimachi School (April)Nakameguro School (October)Kachidoki School (November)Ochanomizu School (December)Funabashi School |
| 2024 | (March)Medic Shibuya School (June)Yoga School (December)Ichigao School |
| 2025 | (March)Shonandai School Sengawa School (May)Shinkawasaki School (June)Unoki School |
