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Private company

Riso Kagaku Corporation

Logo: RISO KAGAKU, CC BY-SA 4.0, via Wikimedia Commons3

Japanese corporation

Riso Kagaku Corporation (理想科学工業株式会社, Risō Kagaku Kōgyō Kabushiki-gaisha) is a Japanese corporation which is the inventor, manufacturer, and distributor of the RISO Printer-Duplicator, a.k.a. This device automatically creates a stencil-type master (from a paper original or digital file), thereby enabling it reproduce single-colour documents at high speed and low cost, in a machine that has a small footprint and a relatively low purchase price. The firm was established in Tokyo, Japan, where it continues to maintain its headquarters today.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1946Founded1

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Riso Kagaku Corporation (理想科学工業株式会社, Risō Kagaku Kōgyō Kabushiki-gaisha) is a Japanese corporation which is the inventor, manufacturer, and distributor of the RISO Printer-Duplicator, a.k.a. Risograph. This device automatically creates a stencil-type master (from a paper original or digital file), thereby enabling it reproduce single-colour documents at high speed and low cost, in a machine that has a small footprint and a relatively low purchase price.2

Timeline

  1. 1946Founded Founded1

Sources

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