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Japanese Yen Deposits	12 Months Ended
	Oct. 31, 2017
Cash and Cash Equivalents [Abstract]
Japanese Yen Deposits	3. Japanese Yen Deposits Japanese Yen principal deposits are held in a Japanese Yen-denominated, interest-bearing demand account. The interest rate in effect as of October 31, 2017 was an annual nominal rate of -0.10%. For the year ended October 31, 2017, there were Japanese Yen principal deposits of 31,802,013,465, Japanese Yen principal redemptions of 30,833,153,795 and Japanese Yen withdrawals (to pay expenses) of 66,298,233 resulting in an ending Japanese Yen principal balance of 12,491,407,290. This equates to 109,930,540 USD (which includes USD redemptions payable). For the year ended October 31, 2016, there were Japanese Yen principal deposits of 48,913,044,314, Japanese Yen principal redemptions of 52,752,711,224 and Japanese Yen withdrawals (to pay expenses) of 91,904,462, resulting in an ending Japanese Yen principal balance of 11,588,845,853. This equates to 110,280,686 USD. For the year ended October 31, 2015, there were Japanese Yen principal deposits of 47,636,264,433, Japanese Yen principal redemptions of 43,753,574,107 and Japanese Yen withdrawals (to pay expenses) of 48,247,219 resulting in an ending Japanese Yen principal balance of 15,520,417,225. This equates to 128,613,360 USD. Net interest, if any, associated with creation and redemption activity is held in a Japanese Yen-denominated non-interest-bearing account, and any balance is distributed in full as part of the monthly income distributions, if any.

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The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 305
-URI http://asc.fasb.org/topic&trid=2122426

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