".. the Kanto region including Tokyo will reduce intake from the Tone River system by 10 percent starting at 9 a.m. Wednesday, the infrastructure ministry and local governments said. All six prefectures in the region — Tokyo, Ibaraki, Tochigi, Gunma, Saitama and Chiba — will limit their intake from the system."
Source:
Tokyo area forced to cut intake from major water source by 10%
Kyodo
July 23rd 2013
Japan Times