The Yomiuri ShimbunRestoration work continues on Wednesday at the site where a road cave-in accident occurred a year ago in Yashio, Saitama Prefecture. YASHIO, Saitama — Wednesday marked one year since a sewer pipe rupture caused a fatal road cave-in accident at an intersection on a prefectural road in Yashio, Saitama Prefecture. Repair work continues at the site, and traffic restrictions remain in place. The accident occurred at around 9:50 a.m. on Jan. 28 last year. “I just want the work to proceed quickly,” said Kiyoshi Muto, 64, who runs a work supplies store nearby.