*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. 3.9 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.
-At 8:30 pm on August 12, we adjusted the rate of water injection from 
 reactor feed water system piping arrangement to approx. 3.8 m3/h since 
 decrease of the water injection rate was confirmed. 
 Water is currently injected at approx. 3.9 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. However at 4:22 pm on August 10, we adjusted 
 the flow rate of injection water to the reactor.
-At 7:30 pm on August 12, we adjusted the rate of water injection from 
 reactor feed water system piping arrangement to approx. 9.0 m3/h since 
 increase of the water injection rate was confirmed. 
 Water is currently injected at approx. 9.1 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. 

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 0:44 am 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 Unit 2 and 
 3.
-At 8:00 pm on June 17, we started operation of Water Treatment Facility 
 against 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 8:42 am on August 5, we started transferring accumulated water at Unit 
 3 turbine building to Centralized Radiation Waste Treatment Facility.
-From 1:35 pm on August 9 to 5:00 pm on August 12, we transferred low 
 level accumulated water from outdoor temporary tanks to Mega Float.
-At 4:47 pm on August 10, we started transferring of accumulated water 
 from turbine building of unit 2 to Centralized Radiation Waste Treatment 
 Facility.
-From 10:00 am to 4:00 pm on August 12, we transferred accumulated water 
 from Unit 6 turbine building to temporary tank.
-At 6:17 pm on August 12, the water treatment facility stopped due to a 
 process error alarm. However, since nothing abnormal was confirmed, we 
 started the water treatment facility at 10:59 pm and resumed the 
 treatment of accumulated water at 11:33 pm.