Kamioka, Hida, Gifu Prefecture, Japan
CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins89% CONFIDENCEOverall confidence: 89%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
Happened as dated, per the source[1]: "the University of Tokyo completed excavation of the colossal cavern that will house the main detector volume of Hyper-Kamiokande" on July 31, 2025.Crews finished excavating the huge cavern in a Japanese mountain that will house the Hyper-Kamiokande neutrino observatory, a step toward the detector's planned start of observations.
$600M
1.00