Free Writing Prospectus

Filed Pursuant to Rule 433

Registration No. 333-169119

February 2, 2011

iPath Exchange Traded Notes

iPath® JPY/USD Exchange Rate ETN

¹ Investors may redeem at least 50,000 units of the iPath® JPY/USD Exchange Rate ETN on a daily basis directly to the issuer, Barclays Bank PLC, subject to the procedures described in the

relevant prospectus.

2 The accumulation component will be calculated on a daily basis in the following manner: The accumulation component on the inception date will equal one. On each subsequent business day

until maturity or early redemption, the accumulation component will equal (1) the accumulation component on the immediately preceding business day times (2) the sum of one plus the product

of the deposit rate times the relevant daycount fraction. The daycount fraction on any business day will be the number of calendar days that have elapsed since the immediately preceding

business day divided by 365.

³ For the iPath® JPY/USD Exchange Rate ETN, the deposit rate on any given day will be equal to the Bank of Japan’s uncollateralized overnight call rate, as reported on Reuters page TONAT or

any successor page on the immediately preceding business day (the “Mutan rate”), minus 0.25%. The deposit rate is intended to represent the actual rate that would be paid by a bank on an

overnight deposit of Japanese yen.

iPath Exchange Traded Notes (ETNs) are senior, unsubordinated, unsecured debt securities issued by Barclays Bank PLC delivering

exposure to the returns of a market or strategy with the trading flexibility of a listed security. The iPath® JPY/USD Exchange Rate ETN is

designed to provide investors with cost-effective exposure to the Japanese yen/U.S. dollar exchange rate (the “Index”). Investors can

trade on an exchange at market price or receive a cash payment at the scheduled maturity or through early redemption¹, based on the

performance of the Index and an accumulation component2, less investor fees.

NOTE DETAILS

Ticker JYN

Intraday indicative value ticker JYN.IV

Bloomberg index ticker N/A

CUSIP 06739G851

Primary exchange NYSE Arca

Yearly fee 0.40%

Inception date 05/08/07

Maturity date 05/14/37

Index JPY/USD Exchange Rate

Deposit Rate³ Mutan-25 bps

The investor fee is equal to the Yearly Fee times the principal amount of your securities times

the index factor, calculated on a daily basis in the following manner: The investor fee on the

inception date will equal zero. On each subsequent calendar day until maturity or early

redemption, the investor fee will increase by an amount equal to the Yearly Fee times the

principal amount of your securities times the index factor on that day (or, if such day is not a

trading day, the index factor on the immediately preceding trading day) divided by 365. The

index factor on any given day will be equal to the currency component on that day times the

accumulation component on that day.

ISSUER DETAILS

Barclays Bank PLC long-term, unsecured obligations*

S&P rating AAMoody’s

rating Aa3

The iPath ETNs are not rated, but are backed by the credit of Barclays Bank PLC. The iPath

ETNs rely on the rating of their issuer, Barclays Bank PLC.

* We have not obtained a rating from any rating organization with respect to the iPath ETNs. A

security rating is not a recommendation to buy, sell or hold securities, and each rating should

be evaluated independently of any other rating. A security rating is subject to revision or

withdrawal at any time by the assigning rating organization, and there is no assurance that any

security rating will remain in effect for any given period of time or that it will not be lowered,

suspended or withdrawn entirely by the applicable rating agency. Any such lowering,

suspension or withdrawal of any rating may have an adverse effect on the market price or

marketability of the iPath ETNs.

CUMULATIVE INDEX RETURNS

PERCENTAGE CHANGE

-20%

-10%

0%

10%

20%

30%

40%

50%

2002 2003 2004 2005 2006 2007 2008 2009 2010

Sources: BlackRock (1/1/97-1/99), Reuters (1/99-12/17/08),

Bloomberg (12/18/08-12/31/10) (based on daily returns).

Index returns are for illustrative purposes only and do not represent actual iPath ETIndex ETN

performance. Index performance returns do not reflect any management fees,

transaction costs or expenses. Indexes are unmanaged and one cannot invest directly

in an index. Past performance does not guarantee future results. For current Index

and iPath ETN performance, go to www.iPathETN.com.

Index returns are hypothetical and are an illustration of how the index would have

performed based on current methodology. This data does not reflect actual performance

of the index.

INDEX CORRELATIONS

JPY/USD Exchange Rate 1.00

S&P 500 Index -0.20

Barclays Capital U.S. Aggregate Bond Index 0.35

MSCI EAFE Index -0.13

S&P GSCI® Total Return Index -0.16

Sources: S&P, Barclays Capital, MSCI Inc., Bloomberg, BlackRock (12/05—12/10), based on

monthly returns.

iPath® JPY/USD Exchange Rate ETN

FIND YOUR iPATH 1-877-764-7284 www.iPathETN.com

The U.S. dollar/Japanese yen exchange rate is a foreign exchange spot rate that measures the relative values of two currencies, the

Japanese yen and the U.S. dollar. When the Japanese yen appreciates relative to the U.S. dollar, the U.S. dollar/Japanese yen

exchange rate decreases, the JPY/USD exchange rate increases and the value of the ETNs increases; when the Japanese yen

depreciates relative to the U.S. dollar, the U.S. dollar/Japanese yen exchange rate increases, the JPY/USD exchange rate decreases

and the value of the ETNs decreases. The JPY/USD exchange rate is determined by dividing one by the U.S. dollar/Japanese yen

exchange rate and truncating the quotient to ten decimal places. As of December 18, 2008 the U.S. dollar/Japanese yen exchange

rate has been the rate reported each day on Bloomberg screen USDJPY WMCO Curncy <GO> at approximately 4:00 pm, London

time, or any successor page.

INDEX TOTAL RETURNS & STANDARD DEVIATION

(as of 12/31/10)

1-YEAR RETURN % 3-YEAR RETURN %

ANNUALIZED

5-YEAR RETURN %

ANNUALIZED

STANDARD DEVIATION

% ANNUALIZED*

JPY/USD Exchange Rate 14.56 11.17 7.76 10.44

S&P 500 Index 15.06 -2.86 2.29 17.82

Barclays Capital U.S. Aggregate Bond Index 6.54 5.90 5.80 3.65

MSCI EAFE Index 7.75 -7.02 2.46 21.55

S&P GSCI® Total Return Index 9.03 -12.84 -5.70 27.69

* Based on monthly returns for 12/05—12/10. Sources: S&P, Barclays Capital, MSCI Inc., Bloomberg, BlackRock.

Index returns are for illustrative purposes only and do not represent actual iPath ETN performance. Index performance returns do not reflect any management fees, transaction costs or

expenses. Indexes are unmanaged and one cannot invest directly in an index. Past performance does not guarantee future results. For current Index and iPath ETN performance, go to

www.iPathETN.com.

An investment in iPath ETNs involves risks, including possible loss of principal. For a description of

the main risks see “Risk Factors” in the applicable prospectus.

Barclays Bank PLC has filed a registration statement (including a prospectus) with the SEC for the

offering to which this communication relates. Before you invest, you should read the prospectus

and other documents Barclays Bank PLC has filed with the SEC for more complete information

about the issuer and this offering. You may get these documents for free by visiting www.iPathETN

.com or EDGAR on the SEC website at www.sec.gov. Alternatively, Barclays Bank PLC will arrange

for Barclays Capital Inc. to send you the prospectus if you request it by calling toll-free

1-877-764-7284, or you may request a copy from any other dealer participating in the offering.

BlackRock Fund Distribution Company assists in the promotion of the iPath ETNs.

iPath ETNs (the “Securities”) are unsecured obligations of Barclays Bank PLC and are not secured

debt. The Securities are riskier than ordinary unsecured debt securities and have no principal

protection. Risks of investing in the Securities include limited portfolio diversification, trade price

fluctuations, uncertain principal repayment, and illiquidity. Investing in the Securities is not equivalent to

direct investment in index or index components. The investor fee will reduce the amount of your return

at maturity or on redemption, and as a result you may receive less than the principal amount of your

investment at maturity or upon redemption of your Securities even if the value of the relevant index has

increased or decreased (as may be applicable to the particular series of Securities). An investment in

iPath ETNs may not be suitable for all investors.

The Securities may be sold throughout the day on the exchange through any brokerage account. There

are restrictions on the minimum number of Securities you may redeem directly with the issuer as

specified in the applicable prospectus. Commissions may apply and there are tax consequences in the

event of sale, redemption or maturity of Securities. Sales in the secondary market may result in

significant losses.

iPath ETNs typically have lower investor fees than currently existing mutual funds that invest in similar

markets and are available to retail investors. Buying and selling iPath ETNs will result in brokerage

commissions.

An investment in iPath ETNs linked to the performance of a foreign currency exchange rate is subject to

risks associated with fluctuations, particularly a decline, in the price of the applicable single foreign

currency relative to the U.S. dollar. Factors that may have the effect of causing a decline in the price of

a foreign currency include national debt levels and trade deficits, domestic and foreign inflation rates,

domestic and foreign interest rates, and global or regional economic, financial, political, regulatory,

geographical or judicial events. Currency exchange rates may be extremely volatile, and exposure to a

single currency can lead to significant losses.

©2011 Barclays Bank PLC. All rights reserved. iPath, iPath ETNs and the iPath logo are registered

trademarks of Barclays Bank PLC. All other trademarks, servicemarks or registered trademarks are the

property, and used with the permission, of their respective owners. iP-0336-0111

Not FDIC Insured • No Bank Guarantee • May Lose Value

iP-JYN-I1210