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 powered by the off-site transmission line. We are now injecting freshwater
 by a motor driven pump powered by the off-site transmission line.
-At 10:06 am on June 15, the amount of injected water to the reactor
 was changed from approx. 5 m3/h to approx. 4.5 m3/h. Current injected
 water amount is approx. 4.5 m3/h through feed water system.
-As it was suspected that hydrogen gas had been accumulated inside Primary
 Containment Vessel, in order to prevent increase in density of oxygen,
 we commenced the valve opening operation concerning injection of nitrogen
 gas into the primary containment vessel at 10:30 pm on 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. 
 The current rate of water injection is approx. 5 m3/h through the reactor
 feed water system piping arrangement. 

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.
The current rate of water injection is approx. 11.5 m3/h through the reactor
 feed water system piping arrangement.

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 has occurred.

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 has occurred.

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 has occurred.

Operation for cooling the spent fuel pools
-At 5:21 pm on May 31, we started cyclic cooling of the spent fuel pool
 in Unit 2 using alternative cooling system for fuel pool cooling and filtering system. 
-From 4:10 pm to 8:52 pm on June 14, we sprayed water to Unit 4 by concrete
 pumping vehicle (From 4:11 am to 7:15 pm, hydrazine [corrosion inhibitor]
 was also injected at the same time).
-We will continuously conduct further water spray depending on the conditions
 of spent fuel pools, if needed. 

Others  
-At 1:30 pm on April 26, we started spraying the dust inhibitor inside
 the site.
 On May 27, we started spraying dust inhibitor to Turbine Building of Units 1.
 We will implement spraying the dust inhibitor to other turbine and reactor
 buildings of Units 1 to 4.
-At 2:00 pm on May 1, we started transferring accumulated water in the turbine
 building of Unit 6 to temporary tanks.
-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.
-On May 31, a TEPCO employee confirmed oil leakage to the sea surface around
 the curtain wall of the water intake canal of Unit 5 and 6 and absorption
 mattresses and oil fences were installed. At approximately 10:00 am on June
 14 an opening of oil leakage around the base of the curtain wall was shut off.
-At 6:39 pm
 on June 4, we started transferring accumulated water from vertical shafts (trenches)
 of turbine building of Unit 2 to Process Main Building.
-At 12:42 pm on June 11, we started to operate local exhausters in order to
 improve inside environment of Unit 2 Reactor Building.
-At approximately 10:00 am on June 13, we started the operation of the circulating
 seawater purification facility installed at the screen area of Unit 2 and 3.
-On June 14 part of water injection lines of Units 1 to 3 were changed
 to polyethylene pipes from hoses and during that time water injection to
 reactors of Units 1 to 3 was temporarily suspended. 
-At 10:05 on June 14, transfer of accumulated water in the Unit 3 turbine
 building to the centralized radiation waste treatment facility was initiated. 
-At 10:33 on June 15, transfer of accumulated water in the Unit 1 condenser
 to condenser storage tank was initiated. 
-At 11:05 am on June 15, it was confirmed that a worker from a partner
 company in charge of crane assembling work for the preparing the installation
 of the cover in Unit 1 reactor building at shallow draft quay was smoking
 without his full mask. While the density of radioactive materials in the air
 at the working place was below the detectable level both for particulate
 materials and iodine, whole body counter will be implemented later. 
-We will continue to take all measures to ensure the safety and to continue
 monitoring the surrounding environment around the power station.