The infrastructure ministry has announced a nationwide survey of aging sewer pipe systems following the recent road collapse in Yashio, Saitama Prefecture, that created a massive sinkhole.

The sinkhole was caused by a massive rupture in a sewer pipe running deep below the prefectural road. Installed in 1983, the 4.74-meter-wide reinforced concrete pipeline had corroded at a bend ...

“Every day throughout our country operators are going out into the field and we’re sending robots into sewer pipes, storm water pipes to collect video and inspect the condition of those pipes ...

Following the road collapse in Yashio, Saitama Prefecture, a nationwide emergency inspection of sewer pipes discovered corrosion and other abnormalities in three locations in the prefecture. In ...