I’ve just got this from KasKus, today, and I think I’ll make a useful post in my blog here to help everyone who wants to help Japan but don’t know where to start. It’s kind of an advertising but every click you do will be sent to Japan (seems like a Google AdSense but for charity). And I hope WordPress will not suspend my blog because of this (hope I’m not crossing the WordPress’ T&C). So, long story short, here’s the link 
http://www.clover.sc/jrc/index02.aspx?id&f=1
Open the link above and find a button that looks like the image below:
Click Here
After you clicked, you’ll get this screen as a thank you.
Snapshot Screen
For online trusted donation, one can visit Japan Relief page to help survivors of Japan Earthquake and Tsunami by donating to non-profits listed there.