Before the introduction of the European calendar on 1 January 1873, clocks made for the Japanese market were usually fitted with movable hours that were adjustable according to temporal time. The Japanese divided the day into two parts, from sunrise to sunset and from sunset to sunrise. Each of these parts was further divided into 6 equal hours. Throughout the year, the length of time between sunrise and sunset and sunset to sunrise changes constantly and hence the length of the 6 equal hours in each becomes longer or shorter depending on the time of the year. In most Japanese clocks, the hour indicators were adjusted by hand, usually on a weekly basis.
The present striking bell-clock is in extremely well preserved condition and is still striking and running very efficiently.