The uniformity of the volume was kept for about 300 years in the Edo period, because Edo bakufu strictly took control of the size of masu through 'masuza' (the masu guild) opened both in Edo and in Kyoto.
江戸幕府は江戸と京都に「枡座」を置いて枡の大きさを厳密に統制したので、江戸時代の約300年間大きさの統一が保たれた。