Japanese repaired a giant sinkhole in just a few days

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Workers in Japan took just days to fill a sinkhole that stretched across a five-lane road.

The sinkhole appeared early last week in a southwestern Japanese city outside a busy railway station. Surrounding buildings were evacuated as it threatened to take structures down with it.

One bystander told the Kyodo News Agency, "The electricity went off suddenly, and I heard a loud boom."

SEE MORE: This Sinkhole Swallowed More Than A Dozen Cars In Florence, Italy

But the quick repair — which included reinstalling electricity, water, sewage, gas and telecommunication lines and resurfacing the road — illustrates Japanese engineering and efficiency.

The speed with which the construction workers completed the task was reminiscent of the effort to reopen damaged roads after the March 2011 triple disaster. More than 18,000 people died after a tsunami was triggered by the strongest recorded earthquake ever in Japan. The tsunami destroyed whole towns and caused a triple meltdown at the Fukushima Daiichi nuclear power plant.

See in and around the massive sinkhole:

10 PHOTOS
Huge Japanese sinkhole spans five lanes of traffic
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Huge Japanese sinkhole spans five lanes of traffic
A huge sinkhole is seen at an intersection near Hakata station in Fukuoka, Japan, November 8, 2016 in this photo taken by Kyodo. Mandatory credit Kyodo/via REUTERS 
A huge sinkhole is seen at an intersection near Hakata station in Fukuoka, Japan, November 8, 2016 in this photo taken by Kyodo. Mandatory credit Kyodo/via REUTERS
A huge sinkhole is seen at an intersection near Hakata station in Fukuoka, Japan, November 8, 2016 in this photo taken by Kyodo. Mandatory credit Kyodo/via REUTERS 
This combo shows a photo of a giant sinkhole (R), measuring around 30 metres (98 feet) wide and 15 metres deep, which appeared in a five-lane street in the middle of the Japanese city of Fukuoka on November 8, 2016 and another photo (L) of the same section of road after repairs were made on November 15. The Japanese city on November 15 reopened the busy street that collapsed into a giant sinkhole, with efforts of crews who worked round the clock for a week drawing raves on social media. / AFP / JIJI PRESS / JIJI PRESS / Japan OUT (Photo credit should read JIJI PRESS/AFP/Getty Images)
This combo shows a photo of a giant sinkhole (L) measuring around 30 metres (98 feet) wide and 15 metres deep, which appeared in a five-lane street in the middle of the Japanese city of Fukuoka on November 8, 2016 and another photo (R) of the same section of road after repairs were made on November 15. The Japanese city on November 15 reopened the busy street that collapsed into a giant sinkhole, with efforts of crews who worked round the clock for a week drawing raves on social media. / AFP / JIJI PRESS / JIJI PRESS / Japan OUT (Photo credit should read JIJI PRESS/AFP/Getty Images)
Personnel are seen by a giant sinkhole as they work to fill the hole that appeared in the middle of Fukuoka's bustling business district, swallowing part of a five-lane street, on November 9, 2016. Workers dumped huge amounts of wet cement and sand into the gaping hole, measuring around 30 metres (98 feet) wide and 15 metres deep, that had exposed support columns of nearby buildings at a traffic intersection. / AFP / JIJI PRESS / STR / Japan OUT (Photo credit should read STR/AFP/Getty Images)
Personnel are seen by a giant sinkhole as they work to fill the hole that appeared in the middle of Fukuoka's bustling business district, swallowing part of a five-lane street, on November 9, 2016. Workers dumped huge amounts of wet cement and sand into the gaping hole, measuring around 30 metres (98 feet) wide and 15 metres deep, that had exposed support columns of nearby buildings at a traffic intersection. / AFP / JIJI PRESS / STR / Japan OUT (Photo credit should read STR/AFP/Getty Images)
A giant sinkhole is seen in a five-lane urban boulevard, exposing support columns of nearby buildings at a traffic intersection in Fukuoka, southwestern Japan, on November 8, 2016. A giant sinkhole, measuring around 20 metres (66 feet) by 15, appeared in the middle of a busy Japanese city on November 8, swallowing part of a five-lane street near the main railway station. / AFP / JIJI PRESS / JIJI PRESS / Japan OUT (Photo credit should read JIJI PRESS/AFP/Getty Images)
This photo shows a giant sinkhole (C) in a five-lane urban boulevard, eroding soil and exposing underground steel columns supporting commercial buildings in Fukuoka, southwestern Japan, on November 8, 2016. No injuries were reported as the accident occurred in the early morning hours. / AFP / JIJI PRESS / STR / Japan OUT (Photo credit should read STR/AFP/Getty Images)
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As for this recent sinkhole, The Guardian reports that workers filled it with 6,200 cubic meters of sand and cement.

One local official told CNN that nearby construction to expand the city's subway line might have caused the collapse.

SEE MORE: As Japan's Population Ages, Its Economy Can't Keep Up

Any hole in the ground created by wear and tear and water drainage can be considered a sinkhole. They are frequently caused by natural processes but can also be the result of human activity. Their actual size does not matter, but they can be just a few feet across or large enough to swallow entire buildings.

Sinkholes also come in different varieties: Those created over time are called cover-subsidence sinkholes, and those that suddenly appear are called cover-collapse sinkholes.

No one was reported injured in the sudden collapse. The roadway reopened a week later on Tuesday.

Related: Take a look at just how often these sinkholes occur:

47 PHOTOS
Massive, shocking sinkholes from around the world
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Massive, shocking sinkholes from around the world
SOLIKAMSK, RUSSIA - NOVEMBER 20: A view of a sinkhole stretching 20 by 30 meters at the Solikamsk-2 mine on November 20, 2014 in Solikamsk, Perm region, Russia. (Photo by Uralkali Press Center/TASS/Anadolu Agency/Getty Images)
SOLIKAMSK, RUSSIA - NOVEMBER 20: A view of a sinkhole stretching 20 by 30 meters at the Solikamsk-2 mine on November 20, 2014 in Solikamsk, Perm region, Russia. (Photo by Uralkali Press Center/TASS/Anadolu Agency/Getty Images)
This photo provided by the Pasco County Police Department shows a car in a hole in Holiday, Fla., Monday, Nov. 10, 2014. Six families were evacuated from the immediate area. Pasco County officials say the hole was 10 feet wide and 10 feet deep. County spokesman Doug Tobin says engineers had not confirmed that it was sinkhole. (AP Photo/Pasco County Police Department)
A view of a sinkhole that opened a few days earlier in Natal, Brazil, Sunday, June 22, 2014. The sinkhole, caused by recent rains, swallowed cars and damaged the homes of some 150 families living in a poor neighborhood in the northern Brazilian city that's one of 12 hosting the World Cup matches. (AP Photo/Antonio Calanni)
A view of a sinkhole that opened a few days earlier in Natal, Brazil, Sunday, June 22, 2014. The sinkhole, caused by recent rains, swallowed cars and damaged the homes of some 150 families living in a poor neighborhood in the northern Brazilian city that's one of 12 hosting the World Cup matches. (AP Photo/Antonio Calanni)
This photo provided by the New Mexico Department of Transportation, work crews look over a sinkhole 20 miles west of Albuquerque, N.M. in the median of I-40 on Friday, Sept. 13, 2013. A drainage inlet in the highway median washed out because of heavy rains and the water eroded the large hole. Previously drought-stricken rivers surged their banks across New Mexico on Friday, closing roads, stranding children at schools and forcing evacuation from Las Vegas to Truth or Consequences from "life-threatening" floods. (AP Photo/New Mexico Department of Transportation)
A sinkhole 40 to 50 feet in diameter opened up overnight and damaged three buildings at the Summer Bay Resort, Monday, Aug. 12, 2013, in Clermont, Fla. Lake County Fire Rescue Battalion Chief Tony Cuellar says about 30 percent of the three-story structure at Summer Bay Resort collapsed around 3 o'clock this morning. Another section was sinking. (AP Photo/John Raoux)
AP10ThingsToSee - This photo provided by the Toledo, Ohio Fire and Rescue Department shows a car at the bottom of a sinkhole caused by a broken water line in Toledo, Ohio on Wednesday, July 3, 2013. Police say the driver, 60-year-old Pamela Knox of Toledo, was shaken up and didn't appear hurt but was taken to a hospital as a precaution. (AP Photo/Toledo, Ohio Fire and Rescue Department, Lt. Matthew Hertzfeld, File)
A front loader pushes dirt and gravel onto a sinkhole caused by a broken water main as United Water employees look on, Thursday, March 28, 2013, in Hoboken, N.J. According to Hoboken Mayor Dawn Zimmer, the break occurred early Thursday at a construction site and part of the city is without water. A boil water alert was issued to residents. (AP Photo/Julio Cortez)
This March 8, 2013 photo provided by Golfmanna shows golfers looking into a sinkhole that opened up under golfer Mark Mihal on the 14th hole of a golf course in Waterloo, Ill. Mihal was hoisted out safely with a rope after falling 18 feet into the 10-foot-wide pit. (AP Photo/Courtesy Golfmanna)
A home sits near a sinkhole, about 100-feet wide and 50-feet deep, Saturday, May 5, 2012, in Windermere, Fla. The family was forced to evacuate the home. (AP Photo/John Raoux)
A vehicle is seen in a sinkhole as bus driver Debbie Baker-Star drives a school bus to pick up stranded people following superstorm Sandy, Wednesday, Oct. 31, 2012, in Seaside Heights, N.J. Sandy, the storm that made landfall Monday, caused multiple fatalities, halted mass transit and cut power to more than 6 million homes and businesses. (AP Photo/Julio Cortez)
A home sits near a sinkhole, about 100-feet wide and 50-feet deep, Saturday, May 5, 2012, in Windermere, Fla. The family was forced to evacuate the home. (AP Photo/John Raoux)
Rescuers work at the scene of a landslide in Saint-Jude, Quebec as shown from the air on Tuesday, May 11, 2010. Four people, including two children, are missing after a sinkhole triggered by a landslide swallowed their house northeast of Montreal. (AP Photo/The Canadian Press, Graham Hughes)
A Los Angeles fireman looks under a fire truck stuck in a sinkhole in the Valley Village neighborhood of Los Angeles Tuesday, Sept. 8, 2009. Four firefighters escaped injury early Tuesday after their fire engine sunk into a large hole caused by a burst water main in the San Fernando Valley, authorities said. (AP Photo/Nick Ut)
**ADVANCE FOR SUNDAY, MAY 11** John Sparkman is dwarfed as he looks into a sinkhole near Picher, Okla., Saturday, April 6, 2008. Years of lead and zinc mining has left turned the town into a superfund site with sinkholes, lead-laced mountains of rocn, and tainted water. (AP Photo/Charlie Riedel)
TORONTO, ON - JULY 9 - A sinkhole on Disco Rd. near the Hwy 427 is seen as a result of Monday's rain storm. July 9, 2013. (Andrew Francis Wallace/Toronto Star via Getty Images)
Buildings collapse into a sinkhole at the Summer Bay Resort on U.S. Highway 192 in Clermont, Florida, Monday, August 12, 2013. No one was injured but about three dozen resort goers left behind car keys, medication and other personal belongings inside their luxury condominiums after the crumbling edifices were evacuated. (Red Huber/ Orlando Sentinel/MCT via Getty Images)
TORONTO, ON - JULY 9: A sinkhole opened up on Disco Road at Hwy 427 after a massive storm and flooding in the GTA. (Andrew Francis Wallace/Toronto Star via Getty Images)
CHICAGO, IL - APRIL 18: Workers pull a truck from a sinkhole that opened up on a residential street in the South Deering neighborhood on April 18, 2013 in Chicago, Illinois. The driver of the truck was hospitalized after driving into the 15-feet-deep hole while on his way to work. Two other vehicles were also swallowed by the sinkhole. (Photo by Scott Olson/Getty Images)
CHICAGO, IL - APRIL 18: Workers prepare to pull a truck from a sinkhole that opened up on a residential street in the South Deering neighborhood on April 18, 2013 in Chicago, Illinois. The driver of the truck was hospitalized after driving into the 15-feet-deep hole while on his way to work. Two other vehicles were also swallowed by the sinkhole. (Photo by Scott Olson/Getty Images)
Rescuers cover a dead body found in a sinkhole on a road in Shenzhen, south China's Guangdong province on May 21, 2013. Five people died when a 10 metre (33 feet) wide sinkhole opened up at the gates of an industrial estate in Shenzhen, the southern Chinese boom town neighbouring Hong Kong, local authorities said on May 21. CHINA OUT AFP PHOTO (Photo credit should read AFP/AFP/Getty Images)
Workers block off the site of a huge sinkhole which occured overnight on Shiliuzhuang road, in Beijing on April 26, 2011. A section of the road collapsed beneath a truck, slightly injuring the driver and a passenger, who both jumped out the vehicle beforeit sank into the hole, as an authoritiy suspects the hole was caused by the construction of a subway line. CHINA OUT AFP PHOTO (Photo credit should read STR/AFP/Getty Images)
A truck lies in a sinkhole which occured overnight on Shiliuzhuang road, in Beijing on April 26, 2011. A section of the road collapsed beneath a truck, slightly injuring the driver and a passenger, who both jumped out the vehicle beforeit sank into the hole, as an authoritiy suspects the hole was caused by the construction of a subway line. CHINA OUT AFP PHOTO (Photo credit should read STR/AFP/Getty Images)

Large sinkhole at the Dead Sea coast Israel

(Photo: Getty Images)

Workers have been working around the clock to fix a broken water main on northbound I-25 at the 58th Ave. exit on Sunday, February 10, 2008. A workmen monitor the filling of the hole around the repaired pipe (the white one at bottom of photo) with FlashFill, a flowable fill material. As Doug Sandrock (right) of Denver Water said, 'It's like waiting for the swimming pool to fill.' They were racing to try and get the road back for tomorrow's rush hour. Cyrus McCrimmon, The Denver Post (Photo By Cyrus McCrimmon/The Denver Post via Getty Images)
A road worker removes a section of Interstate 25 that buckled after an aging 66 inch cement water main pipe broke Thursday causing a sinkhole on Interstate 25 on the north side of Denver Friday, Feb. 8, 2008 (AP Photo/Will Powers)
Denver Water employees work Friday, Feb. 8, 2008 to remove a section of aging 66 inch water main that broke on Interstate 25 Thursday, in Denver, Colo.. The water created a massive sinkhole and buckled a large section of the highway.The crater was 16-feet deep and 40-feet wide. (AP Photo/Will Powers)
Denver Water employees work to remove a section of aging 66 inch water main cement pipe Friday, Feb. 8, 2008, that broke Thursday, in Denver, Colo.. The water created a massive sinkhole and buckled a large section of the highway. (AP Photo/Will Powers)
An Italian firefighter walks in front a giant sinkhole in Via Posillipo street after the road collapsed following persistent rain in Naples, Italy, Sunday, Nov. 7, 2004. (AP Photo/Salvatore Laporta)
Workers discuss the situation at Owings Mills Town Center when a car carrying two passengers fell into a sinkhole measuring 30x16x 20 feet deep Wednesday, April 28, 2004, in Owings Mills, Md. Both female passengers were transferred to shock trauma. (AP Photo/ Matt Houston)
Utility workers inspsect a large sinkhole in a parking lot that was created when an 82-inch sewage pipe broke, Thursday, July 10, 2003, in Cincinnati. (AP Photo/Al Behrman)
Tony Curtis of the U.S. Army Corps of Engineers examines, Monday, June 2, 2003, in Vail, Colo., where a raging creek broke through an underground culvert, Sunday, sending water into the neighborhood and opening up a 22-foot-wide sinkhole that closed Interstate 70, Colorado's main route through the Rocky Mountains. (AP Photo/Peter M. Fredin)
State regulators' "worst nightmare" happened in June 1994 when a cavernous hole, 106 ft. wide by 185 ft. deep, opened in the center of an IMC-Agrico waste stack near Mulberry, Fla., like a scene out of Jules Verne's "Journey to the Center of the Earth." The sinkhole, shown in photo taken July 13, 1994, at IMC-Agrico's New Wales plant released 20.8 million pounds of liquid phosphoric acid into the ground below. The company was able to clean up the spill before it harmed the drinking water supply, regulators say. (AP Photo/Selbypic)
A huge sinkhole is shown on Hollywood Boulevard in Los Angeles Thursday afternoon, June 22, 1995. The hole opened up after a water main burst above the city's troubled subway project, sending workers scurrying out of the tunnel. The hole grew to 70 feet by early afternoon, forcing the evacuation of up to 100 people from a hospital across the street. (AP Photo/Nick Ut)
A huge sinkhole is shown on Hollywood Boulevard in Los Angeles, June 22, 1995. The hole opened on Thursday after a water main burst above the city's troubled subway project, sending workers scurrying out of the tunnel. The hole grew to 70 feet by early afternoon, forcing the evacuation of up to 100 people from a hospital across the street. (AP Photo/Nick Ut)
FILE - In this May 11, 1981 file photo, this aerial view shows the large sinkhole that continues to grow as workers try unsuccessfully to retrieve sunken sports cars from the depression in Winter Park, Fla., (AP Photo)
A small car sits in a huge sinkhole on John Muir Drive in San Francisco Sunday, Jan. 18, 1998. Stopped up sewers caused flooding, and when Harlan Edelman left his car on the side of the road to walk home and wait out the storm, he returned later to find his car in a pit. (AP Photo/Joaquin Siopack)
Workers block off the site of a huge sinkhole which occured overnight on Shiliuzhuang road, in Beijing on April 26, 2011. A section of the road collapsed beneath a truck, slightly injuring the driver and a passenger, who both jumped out the vehicle beforeit sank into the hole, as an authoritiy suspects the hole was caused by the construction of a subway line. CHINA OUT AFP PHOTO (Photo credit should read STR/AFP/Getty Images)
CHEVY CHASE, MD - DECEMBER 3: A car sits in a sinkhole caused by a broken water main, which collapsed part of Friendship Blvd. on December 3, 2010 in Chevy Chase, Maryland. No one was reported injured in the accident. (Photo by Logan Mock-Bunting/Getty Images)
A house sits precariously on the edge of an ever-widening sinkhole which has already claimed one home Wednesday, Dec. 13, 1995, in the Sea Cliff area of San Francisco. This house, the home of Walter and Ramona Yee, has been declared unsafe by the city of San Francisco, and will be demolished on Thursday. (AP Photo/Ben Margot)
While listening for life on other planets from the Arecibo Observatory in Arecibo, Puerto Rico, shown in this July 1998 photo, scientists lost their connection when Hurricane Georges struck the island last Monday, knocking out the computer link. The 1,000 foot-wide dish, which is used for the radio telescope, is built in a sinkhole and suffered minimal damage from the Georges' strong winds. (AP Photo/Chris Hawley)
State regulators' "worst nightmare" happened in June 1994 when a cavernous hole, 106 ft. wide by 185 ft. deep, opened in the center of an IMC-Agrico waste stack near Mulberry, Fla., like a scene out of Jules Verne's "Journey to the Center of the Earth." The sinkhole, shown in photo taken July 13, 1994, at IMC-Agrico's New Wales plant released 20.8 million pounds of liquid phosphoric acid into the ground below. The company was able to clean up the spill before it harmed the drinking water supply, regulators say. (AP Photo/Selbypic)
This aerial view shows the large sinkhole that continues to grow as workers try unsuccessfully to retrieve sunken sports cars from the depression in Winter Park, Fla., May 11, 1981. (AP Photo)
Members of a construction crew use jackhammers in a sinkhole at an intersection on W. 48th Street, New York, New York, 1958. (Photo by Weegee (Arthur Fellig)/International Center of Photography/Getty Images)
Police officers and others look at a sinkhole caused by flooding, New York, New York, mid 20th century. (Photo by Weegee (Arthur Fellig)/International Center of Photography/Getty Images)
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