| 1919 | At the time "Bauhaus" opened in Germany, "IZUMIYA Artists' Supply Store" was also established in Shibuya, Tokyo. |
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| 1945 | After a temporary close down affected by war, business was back to operations in Ikebukuro, Tokyo. |
| 1950 | The new company name became "Izumiya Limited." |
| 1952 | Establishment of trade and sales department. Introduced the latest Western design trends. |
| 1961 | Commenced importing "Industrial Clays." |
| 1970 | Reorganization of company into "Izumiya Corporation." |
| 1972 | Famous Detroit automotive modeler Ron Martin, invited for a clay modeling seminar. With his help, clay modeling techniques became popular in Japan. |
| 1981 | Commenced domestic production of "Industrial Clay J-525." |
| 1986 | Developed "Clay Modeling Film" and released. |
| 1987 | Developed design marker "Copic" and released. |
| 1992 | Izumiya Corporation changed its name to "Too Corporation." Started corporate identity implementation. |
| 1998 | Developed "Clay Modeling Check Foil" and released. |
| 1999 | Sales department for art supplies, clay, educational materials, equipment, design and modeling materials grouped up into an organization and separated from Too Corporation as a new entity "TOOLS Corporation." |
| 2002 | 100% sulfur-less "Industrial Clay NS" series developed and released. Adopted by world-wide automotive manufacturers for use in model studios. Developed "Clay Modeling Sheet" and released. |
| 2003 | Developed "Ellipse Curves 10pcs/set" and released. Developed "Curves 3pcs/set" and released. |
| 2004 | Developed "PM Pad A3 Standard" and released. |
| 2005 | Published "Marker Sketch Design Book" and released. |
| 2006 | Developed "Ellipse Curves Standard" and released. |
| 2007 | Developed "Clay Warmer PU-01" and released. |
| 2008 | Developed "Chrome Silver" and released. Developed "Clay Shaper NSD-120" and released. Developed "Marker Sketch Design DVD Vol.1" and released. Developed "Marker Sketch Pad A3 Standard" and released. |
| 2009 | International sales department for selling clays, modeling materials, equipment, educational materials for automotive design separated from TOOLS Corporation. This entity became the "TOOLS INTERNATIONAL Corporation." |
| 2010 | Developed "Modeling Table MT01" and released. Developed "Marker Sketch Design DVD Vol.2" and released. |
| 2011 | Company HQ moved to Edogawa-ku, Rinkai-cho, Tokyo. |
| 2012 | Published "The Basic Techniques of Clay Modeling" and released. Developed "Marker Sketch Pad A4 Standard" and released. |
| 2013 | "Industrial Clay (Vacuum-Packed)" released. Developed "NS Clay Tape" and released. |
| 2016 | Company HQ moved to Minato-ku, Toranomon, Tokyo. |
