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Organization and Description of the Trust - Additional Information (Detail)	2 Months Ended
	Dec. 31, 2018 JPY (¥) Depositor shares
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Date of Incorporation	Feb. 01, 2007
Initial deposits by sponsor, primary deposit account \| ¥	¥ 10,000
Number of deposits accounts in which trust's assets primarily consist of Japanese Yen \| Depositor	2
Redemptions capital shares, number of shares in each block \| shares	50,000