v3.26.1
Japanese Yen Deposits - Additional Information (Detail)
6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2026
JPY (¥)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
JPY (¥)
Jun. 30, 2026
JPY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
JPY (¥)
Cash and Cash Equivalents [Abstract]              
Principal deposits $ 41,617,203 ¥ 6,432,483,559 $ 546,953,433 ¥ 82,991,150,290      
Principal redemptions 69,412,015 11,023,271,891 $ 150,131,378 69,548,070,558      
Withdrawals (to pay expenses)   ¥ 147,313,239   ¥ 352,465,348      
Deposits, interest bearing $ 429,247,842       ¥ 69,763,505,533 $ 475,304,521 ¥ 74,501,607,104
Annual nominal rate 0.10%       0.10%