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Emperor Tenji of Japan introduces a water clock (clepsydra) called Rokoku. The instrument, which measures time and indicates hours, is placed in the capital of Ōtsu.
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Emperor Tenji
Emperor of Japan from 661 to 672
Emperor Tenji , known first as Prince Katsuragi and later as Prince Nakano Ōe until his accession, was the 38th emperor of Japan who reigned from 668 to 671. He was the son of Emperor Jomei and Empress Kōgyoku, and his children included Empress Jitō, Empress Genmei, and Emperor…Source: Wikipedia (CC BY-SA)
Water clock
Timepiece in which time is measured by the flow of liquid into or out of a vessel
A water clock, or clepsydra, is a timepiece by which time is measured by the regulated flow of liquid into or out from a vessel, and where the amount of liquid can then be measured.Source: Wikipedia (CC BY-SA)
Ōtsu
Core city in Kansai
Ōtsu is the capital city of Shiga Prefecture, Japan. As of 1 October 2021, the city had an estimated population of 343,991 in 153,458 households and a population density of 740 persons per km2. The total area of the city is 464.51 square kilometres (179.35 sq mi).Source: Wikipedia (CC BY-SA)