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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 feed water system was initiated.
-From 3:37 pm on March 25, we started injecting freshwater. We are now
 injecting freshwater by a motor driven pump powered by the off-site
 transmission line at 6 m3/h.
-As it is suspected that hydrogen gas is accumulated inside Primary
 Containment Vessel, we commenced the valve opening operation concerning
 injection of nitrogen gas into the primary containment vessel at 10:30 pm
 April 6 and commenced injection at 1:31am April 7.

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 freshwater by a motor driven pump powered by the
 off-site transmission line at 7 m3/h.

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.
-At 4:53 pm on May 12, as a part of work to switch the water injection
 line to the reactor from the fire extinction system to the reactor feed
 water system, we started water injection through the reactor feed water
 system in addition to through the fire extinction system. 
-On May 23rd, we changed the rate of water injection to Unit 3 through the
 fire extinction system piping arrangement from approximately 4 m3/h to
 approximately 3 m3/h at 5:19 Pm. The current rate of water injection is
 approximately 3 m3/h through the fire extinction system piping
 arrangement and approximately 13.5 m3/h through the reactor feed water
 system piping arrangement . (The description of water injection volume
 has been changed from approximately 12 m3/h to approximately 13.5 m3/h.
 As a monitoring point and an instrument were changed, the value of
 instrument reading has been changed, but we have not conducted any
 operations regarding flow rate adjustment)

Unit 4 (Outage due to regular inspection) 
-At approximately 6:00 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 do not consider any reactor coolant leakage inside the
 primary containment vessel happened.

Unit 5 (Outage due to regular inspection) 
-Sufficient level of reactor coolant to ensure safety is maintained.
-At 5:00 am on March 19, we started the Residual Heat Removal System Pump
 (C) in order to cool the spent fuel pool.
-At 2:30 pm on March 20, the reactor achieved cold shutdown. 
-At this moment, we do not consider any reactor coolant leakage inside the
 primary containment vessel happened.

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
 (B) of Unit 6 in order to cool the spent fuel pool.
-At 7:27 pm on March 20, the reactor achieved cold shutdown. 
-At this moment, we do not consider any reactor coolant leakage inside the
 primary containment vessel happened.

Operation for cooling the spent fuel pools 
-We will continuously conduct further water spray depending on the
 conditions of spent fuel pools, if needed.

Injured 
-We announced on May 23 that a worker who was unloading a tank had his
 left hand injured and was transferred to Iwaki Kyouritsu Hospital, On May
 24, he was diagnosed as "crushed wound on his left thumb " with the
 prospect of one-month hospital visit.

Others 
-At 1:30 pm on April 26, we started spraying the dust inhibitor inside the
 site.
-Since 10:08 am on April 19, we had been transferring high level
 radioactive wastewater from the vertical shaft near the turbine building
 of Unit 2 to the Centralized Radiation Waste Treatment Facility, but the
 transfer was suspended due to change in power supply sources at 9:05 am,
 on May 25. 
-At 2:00 pm on May 1, we started transferring the accumulated water in
 turbine building of Unit 6 to temporary tanks.
-At 11:00 am on May 10, we started transferring the accumulated water from
 the underground level of reactor building to the radiation waste
 treatment facility of Unit 6.
-Since 6:04 pm on May 17, we had been transferring high level radioactive
 waste water from the underground level of the turbine building of Unit 3
 to the Centralized Radiation Waste Treatment Facility, but the transfer
 was suspended due to an inspection on transmission lines and buildings at
 9:10 am, on May 25..
-We will continue to take all measures to ensure the safety and to
 continue monitoring the surrounding environment around the power station.