01 / Rokoku (water clock)
The Shoku Nihongi of 774 recordsa water clock at Dazaifu.

A rokoku (漏刻) is a water clock. The Shoku Nihongi (続日本紀) states in 774 (Hoki 5) that Dazaifu already had one, and the Engishiki (延喜式) also lists six clock keepers each for Dazaifu and Mutsu Province. It is presumed to have stood on Tsukiyama (月山), the hill east of the government office; in 1921 (Taisho 10), a Time Day ceremony was held at the ruins facing it.
- Shoku Nihongi, 774 (Hoki 5): "Dazaifu already has a water clock"
- Engishiki (927): six clock keepers each
- Presumed to have stood on the hill east of the government office (citizens' heritage)
- 1921 (Taisho 10): ceremony held at the government office ruins (都府楼跡)
