Due to the Tohoku-Taiheiyou-Oki Earthquake which occurred on March 11th 
2011, TEPCO's facilities including our nuclear power stations have been 
severely damaged. We deeply apologize for the anxiety and inconvenience 
caused. 

Below is the status of TEPCO's major facilities. 
*new items are underlined

[Nuclear Power Station] 
 Fukushima Daiichi Nuclear Power Station: 
   Units 1 to 3: shutdown due to the earthquake 
   (Units 4 to 6: outage due to regular inspections) 

* The national government has instructed the public to evacuate for those 
local residents within 20km radius of the site periphery and to evacuate 
voluntarily for those local residents between 20km and 30km radius of the 
site periphery.

*Off-site power has been connected to Unit 1 to 6 by March 22, 2011.

* Unit 1 
-The explosive sound and white smoke was confirmed near Unit 1 when the 
 big quake occurred at 3:36pm, March 12th.
-We started injection of sea water at 8:20 pm, March 12th, and then boric 
 acid which absorbs neutron into the reactor afterwards.
-At approximately 2:30 am, March 23rd, we started the injection of sea 
 water into the reactor from feed water system. After that, the injection 
 of freshwater was started from 3:37 pm on March 25th (switched from the 
 seawater injection). At 8:32 am, Mar 29th, transfer from the fire 
 fighting pump to a temporary motor driven pump was made.
-At approximately 10:50 am on March 24th, white smoke was confirmed 
 arising from the top of the reactor building.
-At approximately 11:30 am, March 24th, lights in the main control room 
 were restored.
-At approximately 5:00 pm, March 24th, draining water from underground 
 floor of turbine buildings into a condenser was started and it was paused 
 at approximately 7:30 am, March 29th because we confirmed that the water 
 level reached almost full capacity of a condenser. In order to move the 
 water in the condenser into condensate reservoirs, water transfer from 
 the condensate reservoirs to suppression pool's water surge-tanks has 
 been conducted since around 0:00 pm today, March 31st. 
-Since 1:03 pm today, March 31st, the injection of water by the concrete 
 pumping vehicle has been conducted. 

*Unit 2
-At 1:25 pm, March 14th, since the Reactor Core Isolation Cooling System 
 has failed, it was determined that a specific incident stipulated in 
 Clause 1, Article 15 of Act on Special Measures Concerning Nuclear 
 Emergency Preparedness occurred (failure of reactor cooling function).
 At 5:17 pm, March 14th, while the water level in the reactor reached the 
 top of the fuel rod, we have restarted the water injection with the valve 
 operation.
-At approximately 6:14 am, March 15th, the abnormal sound was confirmed 
 near the suppression chamber and the pressure inside the chamber 
 decreased afterwards. It was determined that there is a possibility that 
 something happened in the suppression chamber. While sea water injection 
 to the reactor continued, TEPCO employees and workers from other 
 companies not in charge of injection work started tentative evacuation to 
 a safe location. 
 Sea water injection to the reactor continued.
-On March 18th, power was delivered up to substation for backup power 
 through offsite transmission line. We completed laying cable further to 
 unit receiving facility in the building, and at 3:46 pm, March 20th the 
 load-side power panel of the receiving facility started to be energized.
-From 3:05 pm to 5:20 pm on March 20th, about 40 tons of seawater was 
 injected into Unit 2 by TEPCO employees.
-At approximately 6:20 pm on March 21st, white smoke was confirmed arising 
 from the top of the reactor building. As of 7:11 am on March 22nd, smoke 
 decreased to the level where we could hardly confirm.
-From around 4:00 pm to 5:00 pm on March 22nd, approximately 18 tons of 
 sea water was injected into the spent fuel pool by TEPCO employees. 
-From 10:10 am on March 26th, freshwater (with boric acid) injection was 
 initiated. (switched from the seawater injection) At 6:31pm, March 27th, 
 transfer from the fire fighting pump to a temporary motor driven pump was 
 made.
-From 10:30 am on March 25th, seawater injection through Fuel Pool Cooling 
 and Filtering System was initiated. The work was finished at 12:19 pm, 
 March 25th. From 4:30 pm, March 29th, freshwater injection through Fuel 
 Pool Cooling and Filtering System was initiated. (We switched from 
 seawater to freshwater). The work was finished at 6:25 pm on March 29th. 
 At 9:25 am, March 30th, we started fresh water injection by a temporary 
 motor driven pump, but we switched the pump to the fire fighting pump due 
 to the pump trouble. At 1:10 pm, March 30th, freshwater injection was 
 suspended, because we found the crack on a part of the hose. At 7:05 pm, 
 March 30th, freshwater injection was resumed and finished at 11:50 pm, 
 March 31. 
-At approximately 4:46 pm, March 26th, lights in the main control room 
 were restored.
-At approximately 4:45 pm, March 29th, the water in condensate reservoirs 
 was being transferred to suppression pool water surge-tanks to prepare 
 for water transfer from a condenser to condensate reservoirs in order to 
 drain water on the underground floor of the turbine building into a 
 condenser.

*Unit 3
-At 6:50 am, March 14th, while water injection to the reactor was under  
 operation (injection of boric acid was done on Mar 13th), the pressure in  
 the reactor containment vessel increased to 530 kPa. As a result, at 7:44  
 am, it was determined that a specific incident stipulated in article 15,  
 clause 1 occurred (abnormal increase of the pressure of reactor  
 containment vessel). Afterwards, the pressure gradually decreased (as of  
 9:05 am, 490 kPa).  
-We continue injecting water into a reactor (Boric acid was added on March 13)
* We announced in our past reports that "On March 14, the pressure in the 
  primary containment vessel increased and it was determined that a 
  specific incident stipulated in the Article 15, the Clause 1 of Act on 
  Special Measures Concerning Nuclear　Emergency Preparedness occurred". 
  However, we made a mistake in the calculation of the pressure value and 
  the status of Unit 3 did not fall under the above-mentioned specific 
  incidents. We will delete the related description from our latest report.
-At approximately 11:01 am, March 14th, an explosion followed by white 
 smoke occurred near Unit 3. 4 TEPCO employees and 3 workers from other 
 companies (all of them were conscious) sustained injuries and were taken 
 to the hospital by ambulances.
-As the temperature of water in the spent fuel pool rose, spraying water 
 by helicopters with the support of the Self Defense Force was considered. 
 However the operation on March 16th was cancelled.
-At 6:15 am, March 17th, the pressure of the Suppression Chamber 
 temporarily increased, but currently it is stable within a certain range. 
 On March 20th, we were preparing to implement measures to reduce the 
 pressure of the reactor containment vessel (partial discharge of air 
 containing radioactive material to outside) in order to fully secure 
 safety. However, at present, it is not a situation to immediately 
 implement measures and discharge air containing radioactive material to 
 outside. We will continue to monitor the status of the pressure of the 
 reactor containment vessel.
-In order to cool spent fuel pool, water was sprayed by helicopters on 
 March 17th with the cooperation of Self-Defense Forces.
-At approximately past 7:00 pm, March 17th, Self-Defense Forces and the 
 police started spraying water by water cannon trucks upon our request 
 for the cooperation. At 8:09 pm, March 17th, they finished the operation.
-At 2:00 pm, March 18th, spraying water by fire engines was started with 
 the cooperation of Self-Defense Forces and the United States Armed 
 Forces. At 2:45 pm, March 18th, the operation was finished.
-At approximately 12:30 am, March 19th, spraying water was started with 
 the cooperation of Fire Rescue Task Forces of Tokyo Fire Department. 
 At approximately 1:10 am, March 19th, the operation was finished. They 
 resumed spraying water at 2:10 pm and finished at approximately 3:40 am, 
 March 20th.
-At approximately 9:30 pm, March 20th, spraying water was started with the 
 cooperation of Fire Rescue Task Forces of Tokyo Fire Department. At 
 approximately 3:58 am, March 21st, the operation was finished.
-At approximately 3:55 pm, March 21st, light gray smoke was confirmed 
 arising from the southeast side of the 5th floor roof of the Unit 3 
 building. The situation was reported to the fire department at 
 approximately 4:21 pm. The parameters of reactor pressure vessel, reactor 
 containment vessel, and monitored environmental data remained stable 
 without significant change. However, employees working around Unit 3 
 evacuated to a safe location. On March 22nd, the color of smoke changed 
 to somewhat white and it is slowly dissipating.
-At approximately 3:10 pm on March 22nd, spraying water to Unit 3 by Tokyo 
 Fire Department's Hyper Rescue and Osaka City Fire Department was 
 conducted, and completed at approximately 4:00 PM on the same day.
-At approximately 10:45 pm on March 22nd, lights in the main control room 
 were restored.
-At 11:00 am on March 23rd, the injection of sea water to spent fuel pool 
 was conducted, and finished approximately at 1:20 pm on the same day.
-At 4:20 pm on March 23rd, light gray smoke was observed belching from 
 Unit 3 building. The situation was reported to the fire department at 
 4:25 pm on March 23rd. The parameters of the reactor, the reactor 
 containment vessel of Unit 3, and monitored figures around the site's 
 immediate surroundings remained stable without significant change. To be 
 safe, workers in the main control room of Unit 3 and around Unit 3 
 evacuated to a safe location. At approximately 11:30 pm on March 23rd and 
 4:50 am on March 24th, TEPCO employees confirmed the smoke has 
 disappeared. Accordingly, workers evacuation was lifted.
-From approximately 5:35 am on March 24th, sea water injection through 
 Fuel Pool Cooling and Filtering System was initiated, and finished at 
 approximately 4:05 pm on the same day.
-From 1:28 pm on March 25th, Hyper Rescue team started water spray. The 
 work finished at 4:00 pm on March 25th.
-From 6:02 pm on March 25th, the injection of freshwater to the reactor 
 was started (switched from the seawater injection). At 8:30 pm on March 
 28th, the injection of fresh water is switched to temporary electricity 
 pumps from the fire engine pumps.
-At approximately 12:34pm March 27th , the injection of water by the 
 concrete pump truck was started. At approximately 2:36 pm, March 27th, 
 the operation was finished.
-At approximately 2:17pm March 29th, the injection of fresh water by the 
 concrete pump truck was started. (Sea water had been injected so far 
 and transfer from seawater to freshwater was made). The water injection 
 was finished at 6:18 PM, March 29th.
-At approximately 5:40 pm, March 28th, the water in condensate reservoirs 
 was being transferred to suppression pool water surge-tanks to prepare 
 for water transfer from a condenser to condensate reservoirs in order to 
 drain water on the underground floor of the turbine building into a 
 condenser. We finished the transfer work at approximately 8:40 am today, 
 March 31st. 

* Unit 4
-At approximately 6:00 am, March 15th, an explosive sound was heard and 
 the damage in the 5th floor roof of Unit 4 reactor building was confirmed. 
 At 9:38 am, the fire near the north-west part of 4th floor of Unit 4 
 reactor building was confirmed. At approximately 11:00 am, TEPCO 
 employees confirmed that the fire was out. 
-At approximately 5:45 am on March 16th, a TEPCO employee discovered a 
 fire at the northwest corner of the Nuclear Reactor Building. TEPCO 
 immediately reported this incident to the fire department and the local 
 government and proceeded with the extinction of fire. At approximately 
 6:15 am, TEPCO staff confirmed at the site that there are no signs of 
 fire.
-At approximately 8:21 am on March 20th, spraying water by fire engines 
 was started with the cooperation of Self-Defense Forces and they finished 
 the operation at approximately 9:40 am. At approximately 6:45 pm spraying 
 water was started by Self-Defenses' water cannon trucks and finished at 
 approximately 7:45 pm.
-At approximately 6:30 am, March 21st, spraying water by fire engines was 
 started with the cooperation of Self-Defense Forces and the United States 
 Armed Forces. At approximately 8:40 am, March 21, they had finished the 
 operation.
-On March 21st, cabling has been completed from temporary substation to 
 the main power center.
-From approximately 5:20 pm on March 22nd, spraying water from the 
 concrete pumping vehicle was conducted and ended at approximately 8:30 pm 
 on the same day.
-From approximately 10:00 am on March 23rd, spraying water from the 
 concrete pumping vehicle was conducted and ended at approximately 1:00 pm 
 on the same day.
-From approximately 2:35 pm on March 24th, spraying water by the concrete 
 pumping vehicle was conducted and ended at approximately 5:30 pm on the 
 same day.
-From 6:05 am on March 25th, seawater injection through Fuel Pool Cooling 
 and Filtering System was initiated and finished at approximately 10:20 
 am on the same day.
-From 7:05 pm on March 25th, water spray by the concrete pumping vehicle 
 was started and finished at 10:07 pm on March 25th.
-From 4:55 pm on March 27th, water spray by the concrete pumping vehicle 
 was started and finished at 7:25 pm on March 27th.
-At approximately 11:50 am on March 29th, lights in the main control room 
 were restored.
-From 2:04 pm on March 30th, water spray by the concrete pumping vehicle 
 was started and finished at 6:33 pm on March 30th.

*Unit 5 and 6
-At 5:00 am on March 19th, we started the Residual Heat Removal System 
 Pump (C ) of Unit 5 in order to cool the spent fuel pool. At 10:14 pm, we 
 started the Residual Heat Removal System Pump (B ) of Unit 6 in order to 
 cool the spent fuel pool.
-Unit 5 has been in reactor cold shutdown since 2:30 pm on March 20th. 
 Unit 6 has been in reactor cold shutdown since 7:27 pm on March 20th.
-At Units 5 and 6, in order to prevent hydrogen gas from accumulating 
 within the buildings, we have made three holes on the roof of the reactor 
 building for each unit.
-At approximately 5:24 pm on March 23rd, the temporary Residual Heat 
 Removal System Seawater Pump automatically stopped when its power source 
 was switched. We restarted the pump at around 4:14 pm, March 24th, and 
 resumed cooling of reactor at around 4:35 pm.

*On March 18th, regarding the spent fuel in the common spent fuel pool, 
 we have confirmed that the water level of the pool is secured. At around 
 10:37 am March 21st, water spraying to common spent fuel pool and 
 finished at 3:30 pm. At around 6:05 pm, fuel pool cooling pump was 
 started to cool the pool.
 *common spent fuel pool: a spent fuel pool for common use set in a 
  separate building in a plant site in order to preserve spent fuel which 
  are transferred from the spent fuel pool in each Unit building.

*On March 17th, we patrolled buildings for dry casks and found no signs 
 of abnormal situation for the casks by visual observation. A detailed 
 inspection is under preparation.
 *dry cask: a measure to store spent fuel in a dry storage casks in 
  storages. Fukushima Daiichi Nuclear Power Station started to utilize 
  the measure from August 1995.

* In total 13 fire engines are lent for spraying water to the spent fuel 
pools and water injection to the nuclear reactors by various regional fire 
departments* as well as Tokyo Fire Department. Also, instruction regarding 
the setting and operation of large scale decontamination system was 
provided.

* On March 21st, 23rd to 29th, we detected technetium, cobalt, iodine, 
cesium, tellurium, barium, lanthanum and molybdenum from the seawater 
around discharge canal of Unit 1, 2, 3 and 4.

* On March 20th, 21st, 23rd to 29th, we detected iodine, cesium, 
tellurium and ruthenium in the air collected at the site of Fukushima 
Daiichi Nuclear Power Station.

* Plutonium has detected from the sample of soil at the site of Fukushima 
Daiichi Nuclear Power Station collected on 21st and 22nd of March, 
Concentration level of Plutonium detected was same as that of under usual 
environment and it is thought not to be harmful to human health. We will 
strengthen environmental monitoring of power station and surrounding 
environment.

* On March 28th, we detected radioactive materials contained in the 
puddles found in the turbine building of Unit 1 to 4.

* At approximately 3:30 pm, March 27th, we found water pooling in the 
vertical shaft of the trench outside of the turbine buildings for Units 
1 to 3. The radiation dose at the surface of the water amounted 0.4 mSv/h 
in Unit 1 and over 1,000 mSv/h in Unit 2. We could not confirm the amount 
of the radiation dose in Unit 3. We will keep observing the condition of 
the water in the vertical shaft.
On March 29th, we detected niobium, tellurium, ruthenium, silver, 
tellurium, iodine, cesium, and ruthenium in the water collected at the 
trench of unit 1. 
 Since around 9:20 am today, March 31st, the water transfer from the   
 vertical shaft of Unit 1 to the reservoir of the centralized environmental   
 facility had been conducted. We finished the task around 11:25 am of the   
 same day. 

* We found a puddle of water at the main building of the centralized 
environmental facility process. We analyzed and detected approximately 
1.2 x 101Bq/cm3 of radioactivity in full dose in the Controlled Area and 
2.2 x 101Bq/cm3 in full dose in the Non-Controlled Area on March 29.

* At 12:03 pm, March 29th, when taking off the flange of the pipe of the 
seawater piping of the Residual Heat Removal System, 3 workers from our 
subcontractor were soaked with water in the pipe. After wiping the water 
off, we confirmed that there was no radioactive contamination to their 
bodies.

*We will continuously endeavor to securing safety, and monitoring of the 
surrounding environment.

Fukushima Daini Nuclear Power Station: 
  Units 1 to 4: shutdown due to the earthquake 
* The national government has instructed evacuation for those local 
residents within 10km radius of the periphery.

* In order to achieve cold shutdown, reactor cooling function was restored 
and cooling of reactors was conducted. As a result, all reactors achieved 
cold shutdown: Unit 1 at 5:00 pm, March 14th, Unit 2 at 6:00 pm, March 14th, 
Unit 3 at 0:15 pm, March 12th, Unit 4 at 7:15 am, March 16th. 

*At 2:30 pm on March 30th, the power source of the residual heat removal 
system(B) to cool the reactor of Unit 1 was secured from an emergency 
power source in addition to an offsite power. This means that all the 
units secure backup power sources (emergency power sources) for the 
residual heat removal systems(B).

* (Unit 1)
As it is confirmed that the temperature of the Emergency Equipment Cooling 
Water System *1 has increased, at 3:20 pm, March 15th, we stopped the 
Residual Heat Removal System (B) for the inspection. Subsequently, failure 
was detected in the power supply facility associated with the pumps of the 
Emergency Equipment Cooling Water System. At 4:25 pm, March 15th, after 
replacing the power facility, the pumps and the Residual Heat Removal 
System (B) have been reactivated.

* (Unit 4)
As it is confirmed that the pressure at the outlet of the pumps of the 
Emergency Equipment Cooling Water System*1 has been decreased, at 8:05 pm, 
March 15th, we stopped the Residual Heat Removal System (B) for the 
inspection. Subsequently, failure was detected in the power supply 
facility associated with the pumps of the Emergency Equipment Cooling 
Water System. At 9:25 pm, March 15th, after replacing the relevant 
facility, the pumps and the Residual Heat Removal System (B) have been 
reactivated.

*1:emergency water system in which cooling water (pure water) circulates 
which exchanged the heat with sea water in order to cool down bearing 
pumps and/or heat exchangers etc.

Kashiwazaki Kariwa Nuclear Power Station: 
  Units 1, 5, 6, 7: normal operation 
  (Units 2 to 4: outage due to regular inspection)

[Thermal Power Station] 
-Hirono Thermal Power Station Units 2 and 4: shutdown due to the 
 earthquake
-Hitachinaka Thermal Power Station Unit 1: shutdown due to the 
 earthquake
-Kashima Thermal Power Station Units 2, 3, 5, 6: shutdown due to 
 the earthquake

[Hydro Power Station] 
-All the stations have been restored.
 (Facilities damaged by the earthquake are now being repaired in 
  a timely manner.)

[Transmission System, etc.] 
-All substation failed due to the earthquake have been restored.
(Facilities damaged by the earthquake are now being repaired in a 
 timely manner.)

[Power Supply to TEPCO's Service Areas] 
-Except in case of planned rolling blackouts, we can supply 
 electricity to our all service areas.

[Supply and Demand Status within TEPCO's Service Area to Secure 
 Stable Power Supply] 
-Considering the critical balance of our power supply capacity and 
 expected power demand forward, in order to avoid unexpected blackout, 
 TEPCO has been implementing rolling blackout (planned blackout alternates 
 from one area to another) since Mar 14th. We will make our utmost to 
 secure the stable power supply as early as possible. For customers who 
 will be subject to rolling blackout, please be prepared for the announced 
 blackout periods. Also for customers who are not subject to blackouts, 
 TEPCO appreciates your continuous cooperation in reducing electricity 
 usage by avoiding using unnecessary lighting and electrical equipment.

[Others] 
-Please do NOT touch cut-off electric wires.
-In order to prevent fire, please make sure to switch off the electric 
 appliances such as hair driers when you leave your house.
-For the customer who has in-house power generation, please secure fuel 
 for generator. 

* Revised past progress