wadokei 和時計 elm toy implementation of a traditionnal japanese clock demo here: https://wadokei.uminokirin.com/ references: https://www.gakken.co.jp/kagakusouken/spread/oedo/03/kaisetsu1.html http://www.amano-tec.com/apps/oldjpclock.html http://ammo.jp/monthly/0211/index.html https://www.ny.us.emb-japan.go.jp/japaninfo/2017/06/01.html https://keisan.casio.jp/exec/system/1216973738#