Statements Of Financial Condition (USD $)	Apr. 30, 2012	Oct. 31, 2011
Assets
Japanese Yen deposits, interest bearing	$ 215,597,801	$ 695,214,700
Japanese Yen deposits, non-interest bearing
Subscriptions Receivable		25,272,806
Total Current Assets	215,597,801	720,487,506
Liabilities, Redeemable Capital Shares and Shareholders' Equity
Redemptions payable		63,185,477
Accrued Sponsor's fee	68,995	209,072
Total Current Liabilities	68,995	63,394,549
Commitments and Contingent Liabilities (note 8)
Redeemable Capital Shares, at redemption value, no par value, 43,870,000 and 38,870,000 authorized, respectively - 1,750,000 and 5,200,000 issued and outstanding, respectively	215,528,806	657,092,957
Shareholders' Equity:
Retained Earnings
Cumulative Translation Adjustment
Total Liabilities, Redeemable Capital Shares and Shareholders' Equity	$ 215,597,801	$ 720,487,506