NEW YORK (CNNMoney) -- Fitch Ratings cut Japan's credit rating Tuesday, citing "growing risks" from the country's "rising public debt ratios."
Fitch forecast that the Japanese government's debt will reach 239% of gross domestic product by the end of the year, which would be the highest of any countries rated by Fitch.
Fitch also criticized Japan's plan to control in its debt as being too "leisurely."
The rating agency downgraded Japan's long-term foreign and local currency issuer default ratings to A+ from AA and AA-, respectively, with negative outlooks for both.
The yen continued to weaken against the U.S. dollar, falling nearly 0.5% to ¥ 79.70 early Tuesday. The Japanese currency is down nearly 4% against the greenback so far this year.
But the rating agency praised Japan for maintaining "exceptional financing flexibility" and its ability to "fund itself at low nominal yields."
"This funding strength is based on the deep pool of Japanese private sector savings," said the agency.
Japan has shown resilience in the face of a tsunami-earthquake that devastated part of its coastline last year, killing thousands of people, wiping out entire communities, and triggering the meltdown of a nuclear power plant.
Despite that, the economy has still managed to grow, bolstered by strong domestic demand and government spending. The government said that its GDP grew by 1% in the first quarter, or an annualized rate of 4.1% for 2012. That's nearly twice the rate of the U.S.
|What we want Apple to unveil at WWDC|
|Millennials squeezed out of buying a home|
|7 traits the rich have in common|
|Big Data knows you're sick, tired and depressed|
|Your car is a giant computer - and it can be hacked|
|Overnight Avg Rate||Latest||Change||Last Week|
|30 yr fixed||3.41%||3.40%|
|15 yr fixed||2.69%||2.68%|
|30 yr refi||3.42%||3.43%|
|15 yr refi||2.70%||2.71%|
Today's featured rates:
|Latest Report||Next Update|
|Home prices||Aug 28|
|Consumer confidence||Aug 28|
|Manufacturing (ISM)||Sept 4|
|Inflation (CPI)||Sept 14|
|Retail sales||Sept 14|