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Japanese Yen Deposits - Additional Information (Detail)
6 Months Ended 12 Months Ended
Jun. 30, 2024
USD ($)
Jun. 30, 2024
JPY (¥)
Jun. 30, 2023
USD ($)
Dec. 31, 2023
JPY (¥)
Jun. 30, 2024
JPY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2023
JPY (¥)
Cash and Cash Equivalents [Abstract]              
Proceeds from purchases of redeemable capital Shares $ 110,502,693 ¥ 17,595,554,066 $ 164,502,258 ¥ 40,464,676,109      
Principal redemptions 45,193,464 6,943,964,268 $ 107,763,792 20,936,241,082      
Withdrawals (to pay expenses)   ¥ 126,950,050   ¥ 194,462,561      
Deposits, interest bearing $ 339,383,481       ¥ 54,593,226,747 $ 312,587,509 ¥ 44,068,586,999
Annual nominal rate 0.00%       0.00%