 
 | Issue | 120th Anniversary of the Diet | |
| First Day | November 29, 2010 | |
| Value | 80 yen x 2 | |
| Designs | C2089a,b - The First temporary building, the National Diet Building, and stained glass of the central hall | |
| Designer | Tamaki Akira (stamp designer) | |
| Printing | Offset in 6 colors | |
| Size | 28.0 x 38.5 mm, vertical | |
| Sheet | 10 stamps (2 x 5) | Sheet | 
Japanese Stamp Specialized Catalog (JSCA) & SAKURA Catalog numbers are adopted.
| (Small Notes for the issue) | 
| The first temporary building in foreground was completed in November 24th, 1890 and a memorable opening ceremony was held on November 29th. The National Diet Building was completed in November 1936 and it has been familiar to people as a symbol of Japan's parliamentary politics until today. Stained glass ceiling of the central hall is designed in background. |