*New items are underlined 

All 6 units of Fukushima Daiichi Nuclear Power Station have been shut down. 

Unit 1 (Shut down) 
-Explosive sound and white smoke were confirmed after the big quake
 occurred at 3:36 pm on March 12. It was assumed to be hydrogen explosion.
-At approximately 2:30 am on March 23, seawater injection to the reactor
 through the reactor feed water system was initiated.
-From 3:37 pm on March 25, we started injecting freshwater by a motor
 driven pump which is now powered by the off-site transmission line.
 Water is currently injected at approx. 3.7 m3/h through reactor feed
 water system piping arrangement.
-We commenced injection of nitrogen gas into Primary Containment Vessel at
 1:31am on April 7.
-At 9:00 am on August 10, we started to assemble steel frame for the
 Reactor Building Cover. 

Unit 2 (Shut down) 
-At approximately 6:00 am on March 15, an abnormal noise began emanating
 from nearby Pressure Suppression Chamber and the pressure within the
 chamber decreased. 
-From 10:10 am on March 26, we started injecting freshwater to the reactor
 and are now injecting fresh water by a motor driven pump powered by the
 off-site transmission line.
 Water is currently injected at approx. 3.7 m3/h through reactor feed
 water system piping arrangement.
-At 8:06 pm on June 28, we started injecting nitrogen gas into the Primary
 Containment Vessel. 

Unit 3 (Shut down) 
-Explosive sound and white smoke were confirmed at approximately 11:01am
 on March 14. It was assumed to be hydrogen explosion.
-From 6:02 pm on March 25, we started injecting fresh water to the reactor
 and are now injecting fresh water by a motor driven pump powered by the
 off-site transmission line.
 Water is currently injected at approx. 7 m3/h through reactor feed water
 system piping arrangement.
-At 8:01 pm on July 14, injection of nitrogen gas into the Primary
 Containment Vessel started. 

Unit 4 (Outage due to regular inspection) 
-At approximately 6 am on March 15, we confirmed the explosive sound and
 the sustained damage around the 5th floor rooftop area of Reactor
 Building.
-At this moment, we don't think there is any reactor coolant leakage
 inside the primary containment vessel. 

Unit 5 (Outage due to regular inspection) 
-Sufficient level of reactor coolant to ensure safety is maintained.
-At 5 am on March 19, we started the Residual Heat Removal System Pump in
 order to cool the spent fuel pool.
-At 2:30 pm on March 20, the reactor achieved cold shutdown.
-At 2:45 pm on July 15, we started the operation of the original Residual
 Heat Removal System Pump (B).
-At this time, we don't think there is any reactor coolant leakage inside
 the primary containment vessel. 

Unit 6 (Outage due to regular inspection) 
-Sufficient level of reactor coolant to ensure safety is maintained.
-At 10:14 pm on March 19, we started the Residual Heat Removal System Pump
 of Unit 6 to cool down Spent Fuel Pool.
-At 7:27 pm on March 20, the reactor achieved cold shutdown. 
-At this time, we don't think there is any reactor coolant leakage inside
 the primary containment vessel. 

Operation for cooling the Spent Fuel Pools 
-At 5:21 pm on May 31, we started cyclic cooling of Spent Fuel Pool of
 Unit 2 by using alternative cooling system of the Pool's cooling and
 filtering system.
-At 7:47 pm on June 30, we started cyclic cooling of Spent Fuel Pool of
 Unit 3 by using alternative cooling system of the Pool's cooling and
 filtering system.
-At 12:44 pm on July 31, we started cyclic cooling of Spent Fuel Pool of
 Unit 4 by using alternative cooling system of the Pool's cooling and
 filtering system.
-At 11:22 am on Aug 10, we started cyclic cooling of Spent Fuel Pool of
 Unit 1 by using alternative cooling system of the Pool's cooling and
 filtering system. 

Others 
-At 11:00 am on May 10, we started transferring accumulated water from the
 underground level of reactor building to the radiation waste treatment
 facility of Unit 6.
-At around 10 am on June 13, we started the operation of the circulating
 seawater purification facility installed at the screen area of Units 2
 and 3.
-At 8:00 pm on June 17, we started operation of Water Treatment Facility
 against the accumulated water. At 3:50 pm on August 18, we added the 2nd
 cesium adsorption instrument and started to treat the accumulated water.
-At 6:00 pm on July 2, we started the circulating injection cooling to
 inject the water, which was treated by the accumulated water treatment
 system, to the reactors through the buffer tank.
-At 4:19 pm on August 18, we transferred accumulated water from the
 turbine building of Unit 2 to Central Radioactive Waste Treatment
 Facility.
-At 11:34 am on August 20, we started operation of the desalting facility
 for the spent fuel pool of Unit 4
-At 9:39 am on August 21, we started transfer of accumulated water from
 the turbine building of Unit 3 to the High Temperature Incinerator
 Building in the Central Radioactive Waste Treatment Facility. 
-At 10 am on August 23, we started transfer of accumulated water from the
 turbine building of Unit 6 to temporary tanks.
-At around 12:30 pm on August 23, we confirmed water leakage (almost one 
 drop/ 30 seconds) from the hoses of primary system of cyclic cooling 
 facility for the fuel spent pool within Unit 4 Waste Treatment Facility 
 and we are receiving the leaking water with a saucer. We are planning 
 replacement of the hose and other measures. As for the cyclic cooling, 
 we are continuing it for the spent fuel spent pool.