Unsolved:Yagen
From HandWiki
Yagen (薬研) is a crushing tool used in phytotherapy in Japan . It uses a wheel which is rolled back and forth to crush ingredients.
It differs from Mortar and pestle used in Japanese cuisine, which are called suribachi (擂鉢) and surikogi (擂粉木).
Original source: https://en.wikipedia.org/wiki/Yagen.
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