Please note: This article is about the Kolat Master inventor of koku. For other uses of the term, please see Tanaka (disambiguation).
Yasuki Tanaka 
Born: 189 
Died: 264 
Titles: Kolat Master

Yasuki Tanaka was a Kolat Master [1] and a merchant of a minor family of the Crane. He invented the Koku [2] and designed the coin in 243 that could be recognized even today. [3]

Rokugani Currency Edit

It was used exclusively by the Crane until the Emperor wondered about the little copper coin and he was given the minting plates as a gift by Tanaka. [3] [2]


  1. Way of the Thief, p. 13
  2. 2.0 2.1 Winter Court:Kyuden Asako, p. 26
  3. 3.0 3.1 Legend of the Five Rings; Third Edition, p. 11

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