Here are a few links to relief funds who are currently fund-raising and donating to Japan in efforts of helping the people of Japan in their time of need.
Doctors without Borders
Foundations beyond Belief
Save the Children
You can also text REDCROSS to 90999 to give $10 in the United States. If you're in Canada text ASIA to 30333 to give $5 and pass this message forward.
You can learn more on how you can make a difference and help in the following link.
Do something that actually matters, donate, then pray for Japan all you want. Two hands working will accomplish more than a thousand clasped in prayer.