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Japanese Yen Deposits - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2023 JPY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 JPY (¥)	Dec. 31, 2023 JPY (¥)	Dec. 31, 2022 JPY (¥)
Cash and Cash Equivalents [Abstract]
Proceeds from purchases of redeemable capital Shares	$ 292,279,802	¥ 40,464,676,109	$ 159,508,534	¥ 21,053,881,528
Principal redemptions	149,619,744	20,936,241,082	119,547,237	15,902,847,088
Withdrawals (to pay expenses)		¥ 194,462,561		¥ 136,111,791
Deposits, interest bearing	$ 312,587,509		$ 187,461,552		¥ 44,068,586,999	¥ 24,734,614,533
Annual nominal rate	(0.20%)				(0.20%)

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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