| 2010 | |
| July 28th | Specialist Meeting on Under Sodium Viewing System of SFR |
| March 17th-18th | Second Specialist Meeting on In-vessel Inspection and Repair of FBR. |
| 2009 | |
| March 19th | Renewal of containment vessel air ventilation system was carried out. |
| 2008 | |
| December 9th | Specialist Meeting on In-vessel Inspection and Repair of FBR. |
| April 15th | Science and technology award. |
| January 15th - February 7th | Inspection of the fuel handling equipment was carried out. |
| 2007 | |
| December 5th | Withdrawal of Upper Core Structure Irradiation Plug Rig was carried out. |
| June 6th | Celebration of the 30th anniversary of Joyo. |
| May 15th | Started the 15th annual inspection. |
| May 8th-14th | The MK-III 6' special cycle was carried out as a short term irradiation test of Minor Actinide (MA) doped MOX fuel. |