HOKKAIDO – A section of ceiling at a Hokkaido Shinkansen tunnel excavation site in Otaru, Hokkaido, collapsed, causing soil and debris to pour in.
Workers found the collapse of the Sasson Tunnel located about 200m underground in a forested area of Otaru at about 7pm (6pm Singapore time) on April 6.
There were no injuries to workers or damage to heavy machinery.




