September 1946 Noboru Hayama opens Risosha, a mimeographic printing shop, in Tokyo.
September 1948 Company name changes to RISO Printing Company.
March 1952 RISO imports the first type printing equipment in Japan from the United Kingdom.
January 1963 Company name changes to RISO KAGAKU CORPORATION ("Ideal Science").
July 1965 Kasumigaura Plant completed, starts operations in August.
June 1969 Sales offices open in Sapporo, Sendai, Nagoya, Osaka, Hiroshima, and Fukuoka.
September 1977 First Print Gocco model, the B6, marketed.
June 1980 First Printer-Duplicator model, the AP7200, marketed.
October 1981 Tsukuba Plant starts operations.
December 1984 RISO Educational Foundation established.
January 1986 RISO, Inc., the first overseas subsidiary, established in the United States. Ube Plant completed.
August 1986 First digital Printer-Duplicator model, the Digital 007, marketed.
April 1989 RISO EUROPE LTD. established in the United Kingdom.
October 1989 Listed over the counter in Japan.
December 1989 RISO (Deutschland) GmbH established.
January 1990 RISO Publisher System introduced.
April 1991 RISO FRANCE S.A. established.
May 1992 RISO (U.K.) LTD. established.
January 1993 RISO IBERICA S.A. established.
April 1993 RISO HONG KONG LTD. established.
June 1993 RISO CANADA, Inc. established.
July 1994 RISO CHINA LTD. established in Hong Kong.
November 1994 RISO (Thailand) LTD. established. Printer-Duplicator GR series introduced.
February 1995 RISO AFRICA (PTY) LTD. established.
June 1995 Printer-Duplicator TR series introduced.
February 1997 SC3000 series system controller introduced.
May 1997 SC7000 series system controller introduced.
November 1997 TM5000 sorter introduced. NC Numbering System introduced. Printer-Duplicator GR3770, the first 600 dpi duplicator introduced.
February 1998 AR8000 envelope/card feeder introduced.
January 1999 CR system introduced
February 1999 SC7700 System Controller , a top-of-the-line high speed RIP that processes data directly to the Printer-Duplicator for fast printing, introduced. Industry-first capability of scanning from any desktop on the network, doubling its value to users.
May 2001 RISO's new RP3700 high-speed digital printer-duplicator debuts at Gutenberg Festival.
September 2001 RISO's breakthrough Zykros technology enables imaging and printing of multiple colors in a single pass.
May 2002 RISO, Inc. signed an agreement with Lexmark under which RISO, Inc. will integrate several of the newest Lexmark multifunction printers (MFPs), software developed by both Lexmark and RISO, and RISO's own printing systems as part of a suite of integrated document management solutions.
September 2004 RISO, Inc. introduces Solutions Assess Express - A New System that Offers Economical Basic Automated Testing Package For Individual Schools.
October 2004 RISO, Inc. unveils its new HC5000 Full Color ComColor Printer.
October 2004 RISO, Inc.,introduces a new series of Printer-Duplicators, the RZ series. The series incorporates the latest in technological advances and breakthroughs in digital duplicating technology.
April 2005 RISO celebrates its 25th year of selling digital duplicators.
