According to the Japan Meteorological Agency, according to radar analysis,
▽ near Tomioka City,
▽ near Shimonita Town,
▽ near Annaka City, and ▽ near Kanra Town in Gunma Prefecture,
it was
raining more than 120 mm per hour until 9:20 pm. seems to have fallen.
In addition,
it is believed that about 120 mm of heavy rain fell in one hour until 9:20 pm in the vicinity of the
western part of Fujioka City and
in the vicinity of Matsuida Town, Annaka City .
Due to the imminent danger of a disaster occurring, the Japan Meteorological Agency is calling for announcing "record-breaking short-term heavy rain information" to ensure safety.