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Japanese Yen Deposits - Additional Information (Detail)
9 Months Ended 12 Months Ended
Sep. 30, 2024
USD ($)
Sep. 30, 2024
JPY (¥)
Sep. 30, 2023
USD ($)
Dec. 31, 2023
JPY (¥)
Sep. 30, 2024
JPY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2023
JPY (¥)
Cash and Cash Equivalents [Abstract]              
Proceeds from purchases of redeemable capital Shares $ 208,308,648 ¥ 32,847,515,598 $ 212,746,723 ¥ 40,464,676,109      
Principal redemptions 64,467,427 9,717,854,783 $ 149,619,744 20,936,241,082      
Withdrawals (to pay expenses)   ¥ 182,167,058   ¥ 194,462,561      
Deposits, interest bearing $ 468,512,869       ¥ 67,016,080,756 $ 312,587,509 ¥ 44,068,586,999
Annual nominal rate 0.00%       0.00%