| 1948 | February | Chiyoda Stationery Corporation founded. |
| 1959 | May | Name changed to PLUS Corporation. |
| 1960 | April | PLUS Steel Industries Corporation founded as a manufacturing division. |
| 1962 | October | Concluded a business partnership for sales with Duplo Seizo Corporation. |
| 1963 | December | PLUS Industrial Corporation founded as a manufacturing department. |
| 1979 | December | Kanto Logistics Center constructed and started operation. |
| 1980 | May | PLUS U.S.A Corporation founded. |
| 1981 | August | PLUS System Engineering Corporation founded. |
| 1983 | March | DLM Japan Ltd. founded. |
| April | Institute of Office Environment founded. | |
| 1984 | May | PLUS Service Center Corporation founded. |
| 1985 | November | Launched the “Office Convenience Business”. |
| 1986 | January | Concluded a business partnership for sales of office furniture with the Italian company Olivetti Synthesis. |
| June | Voice System Service Corporation founded. | |
| November | Took over business of Saitama Silver Seiko Ltd. by acquiring all shares of the company. This business was relaunched as PLUS Industrial Corporation. | |
| 1988 | March | Kansai Logistics Center opened. |
| May | PLUS Material System Corporation founded. | |
| August | Voice System Service Co., Ltd. name changed to PLUS Facility Installation Corporation. | |
| 1988 | November | Institute of Education Environment founded. |
| 1990 | February | PLUS U.S.A. Corporation dissolved and PLUS Corporation of America founded. |
| March | Started Phase 1 construction of Block 1 (plants and logistics facilities) of PLUSLAND. | |
| May | PLUS Logistics Corporation founded. | |
| May | PLUS System Engineering Corporation name changed to PLUS Information System Corporation. | |
| 1991 | March | Higashi Oogishima Center opened. |
| April | PLUSLAND Maebashi plant completed. | |
| May | Iruma file plant established. | |
| September | PLUS Facility Installation Corporation merged with PLUS Logistics Corporation. | |
| 1992 | May | Oota Plant established. |
| June | Started Phase 2 construction of Block 2 (training facilities) of PLUSLAND. | |
| 1993 | March | Launched ASKUL overnight delivery service for office supplies. |
| July | PLUSLAND Otowa Club (training facility) and PLUS heliport completed. | |
| November | PT Chemicals Co., Ltd. founded | |
| 1994 | March | “Meeting Scene business” Division started. |
| September | Duplo Corporation Limited founded. | |
| October | PLUSLAND Factory Area selected as a “Good Design facility” of 1994. | |
1995 |
May | PLUS Industrial Corporation founded PLUS Vietnam Industrial Co., Ltd in Dong Nai Province in Vietnam. |
| August | Tokorozawa file plant founded. | |
| October | PLUSLAND Otowa Club selected as a "Good Design facility" of 1995 | |
| 1996 | October | Began operating “Office Today” chain of stationery convenience stores. |
| 1997 | May | ASKUL Corporation founded. |
| September | “QDS (Quick Delivery System) business” started. (Name changed to Biznet in May 1999.) | |
| December | PLUS Industrial Corporation Iruma Plant acquired ISO9001 certification. | |
| December | Launched SKLEX (School Express), catalog mail-order service for educational supplies and solutions. | |
| 1998 | February | Maebashi Plant and Oota plant acquired ISO9001 certification. |
| March | PLUS Industrial Corporation Maebashi Plant acquired ISO9001 certification. | |
| 1999 | September | Launched “Garage” business, aimed at creating a new market for SOHO furniture in cooperation with stores. |
| 2000 | January | Launched the new sales system “Voice Office System”, providing furniture and related services for small and medium offices beyond the conventional manufacturer channels. |
| February | The headquarters of PLUS Corporation, PLUSLAND, and Iruma Plant of PLUS Industrial Corporation acquired ISO14001 certification. | |
| May | Biznet Corporation, Voice Corporation, BB Search Co., Ltd., and PLUS Financial Service Corporation founded. | |
| October | Began full-scale sales of Schiavello custom-made office furniture from Australia. | |
| October | Acquired part of the business of ITO Corporation. | |
| November | PLUSLAND won the Kanto Bureau of Economy, Trade and Industry Director's Award for its tree planting contribution. | |
| 2001 | January | PLUS Corporation of America acquired the business rights and brand of Lightware, Inc.(U.S.A). |
| February | Acquired a 51% share of Marudai Co., Ltd. a mass merchandise wholesaler | |
| March | Acquired an 87.5% share of Tokyo Needs Co., Ltd., a manufacturer and wholesaler of PC supplies. | |
| April | Jointex Company, a new type of office market wholesaler, was founded. | |
| May | PLUS Corporation and PLUS Industrial Corporation restructured their businesses, launching four new companies: PLUS Vision Corporation PLUS Stationery Corporation, PLUS Space Design Corporation, and PLUS Industrial Corporation. | |
| November | Completed construction at PLUSLAND of Atelier Factory Co., Ltd., a plant and studio for manufacturing wooden office furniture. | |
2002 |
June | PLUS Logistics Corporation entered the auction market for used office furniture |
| June | The headquarters of Biznet Corporation acquired ISO14001 certification. | |
| June | Atelier Factory Co., Ltd. achieved the zero-emissions target. | |
| August | PLUS Space Design Corporation acquisitioned business rights from Interior Division of Dodwell Marketing Co.,Ltd. | |
| October | PLUS Vision Corporation and PLUS Industrial Corporation merged. | |
| 2003 | February | PLUS Vision Corporation and PLUS Stationery Group acquired ISO14001 certification. |
| August | JOINTEX Company started to operate its “smart office” business. | |
| October | PLUSLAND awarded the Minister of Economy, Trade and Industry's Award its tree planting contribution. | |
| 2004 | February | Marudai Co., Ltd. acquired the whole business of Tokyo Needs, and changed its name to Optima Co., Ltd. |
| March | PLUS Logistics Corporation acquired Green Management certification. | |
| July | PLUS Corporation and PLUS Financial Service Corporation merged. | |
| 2005 | March | PLUS Furniture Company acquired ISO14001 certification. |
| April | The staff agency business was separated from PLUS Corporation and established as an independent company: Bright People Corporation. | |
| April | Acquired certification for ISMS and BS7799, both for Information Security Management System. | |
| April | PLUS Corporation and JOINTEX Company merged, aiming at strengthening market functions in office furniture business. | |
| 2006 | February | Imaizumi Technical Research Institute became a wholly owned subsidiary company |
| April | PLUS Vision Corporation transferred its projector business to Kaga Components Co., Ltd. | |
| April | All shares of Plus Information System Corporation were transferred to Hitachi Business Solution Co., Ltd. | |
| November | Opened BTO shop of office furniture “+PLUS” in Akasaka | |
| 2007 | April | PLUSLAND Maebashi plant awarded the Prime Minister's Award for Contributions to the Greening Campaign. |
| 2008 | April | PLUS Logistics Corporation made Hankyu Service Co., Ltd. a subsidiary company. |
| May | JOINTEX Company was integrated with the headquarters of Institute of Education Environment. | |
| 2009 | December | Acquired entire business of PLUS Vision Corporation. |
| 2010 | February | Merged with PLUS Stationery Corporation. |
| June | PLUS Europe GMBH founded in Düsseldorf in Germany. | |
| September | Merged with PLUS Space Design Corporation. |
