Time Out says
Daimyo feudal lords were the only people who could afford the clocks displayed here. Before Japan adopted the solar calendar in 1870, there was a set number of hours between sunrise and sunset, with the result that the length of an hour was longer in summer than in winter. Times were named after the animals of the Chinese zodiac. This one-room museum displays dozens of other timepieces, from alarm clocks to watches worn with a kimono.