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Japanese Yen Deposits - Additional Information (Detail)
12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2022
JPY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2021
JPY (¥)
Dec. 31, 2022
JPY (¥)
Dec. 31, 2021
JPY (¥)
Cash And Cash Equivalents [Abstract]            
Proceeds from purchases of redeemable capital Shares $ 159,508,534 ¥ 21,053,881,528 $ 63,758,649 ¥ 7,056,729,586    
Principal redemptions 119,547,237 15,902,847,088 115,719,701 12,713,904,335    
Withdrawals (to pay expenses)   ¥ 136,111,791   ¥ 130,201,824    
Deposits, interest bearing $ 187,461,552   $ 171,244,773   ¥ 24,734,614,533 ¥ 19,719,691,884
Annual nominal rate (0.20%)       (0.20%)