European mechanical Clock came to Japan while end of Muromachi period. This Clock was developed as Japanese unique Clock (Wa-dokei) which has old Japanese way of time counting. Furthermore inside mechanism of Clock has been transferred to Karakuri Ningyo (Mechanical Doll) which is for people's entertainment in peaceful Edo Period. The author investigated and researched mainly technology transfer of units of escapements and governors from Clock to Karakuri Ningyo.
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