Japanese Yen Deposits - Additional Information (Detail)	12 Months Ended
	Oct. 31, 2013 JPY (¥)	Oct. 31, 2012 JPY (¥)	Oct. 31, 2011 JPY (¥)	Oct. 31, 2013 USD ($)	Oct. 31, 2012 USD ($)	Oct. 31, 2011 USD ($)
Deposits [Abstract]
Annual nominal rate of interest on deposit				0.00%
Japanese Yen principal deposits	¥ 68,580,969,566	¥ 49,684,003,600	¥ 88,793,945,166
Japanese Yen principal redemptions	64,654,426,112	90,510,599,952	56,278,620,069
Japanese Yen withdrawals	56,370,633	118,087,857	65,679,396
Japanese Yen principal balance, ending	¥ 14,178,614,307	¥ 10,308,441,486	¥ 51,253,125,695	$ 144,517,524	$ 128,968,366	$ 657,302,029