| End of water spray by the Hyper Rescue Unit of Tokyo Fire Department to the spent fuel pond of unit 3 which was started 19.3 2011 14:10 | 20.3 2011 03:40 |
 | 20.3 2011 05:00 |
 | 20.3 2011 06:00 |
 | 20.3 2011 07:00 |
 | 20.3 2011 08:00 |
| Start water spray by the Self Defence Force to the spent fuel pond of unit 4 | 20.3 2011 08:21 |
 | 20.3 2011 09:00 |
| End water spray by the Self Defence Force to the spent fuel pond of unit 4 | 20.3 2011 09:40 |
 | 20.3 2011 10:00 |
| The pressure of the unit 3 PCV rose temporarily (320kPa) | 20.3 2011 11:00 |
 | 20.3 2011 11:00 |
 | 20.3 2011 12:00 |
 | 20.3 2011 13:00 |
 | 20.3 2011 14:00 |
 | 20.3 2011 15:00 |
| Injection of 40 t sea water to SFP2 via the Fuel Pool Cooling System starts | 20.3 2011 15:05 |
| The Power Center of unit 2 receives electricity | 20.3 2011 15:46 |
 | 20.3 2011 16:00 |
 | 20.3 2011 17:00 |
| Injection to the Spent Fuel Pool of unit 2 via the Fuel Pool Cooling System ends after injection of 40 tons of seawater | 20.3 2011 17:20 |
 | 20.3 2011 18:00 |
| Start water spray by the Self Defence Force to the spent fuel pond of unit 4 | 20.3 2011 18:45 |
 | 20.3 2011 19:00 |
| End water spray by the Self Defence Force to the spent fuel pond of unit 4 | 20.3 2011 19:45 |
| Water spray by the Hyper Rescue Unit of the Tokyo Fire Department to the spent fuel pond of unit 3 | 20.3 2011 21:36 to 21.3 2011 03:58 |