You may or may not have noticed this little widget in the side bar of this blog. I actually found out about the Word of the Day (WOTD) from Carol's blog.
I then signed up for their French Word of the Day to be sent to my RSS reader. (Thanks!)
Then Rowena, gave me the heads-up that the company had added Japanese! so I quickly added it to the side bar. (Thanks!)
If you want to learn a new language (but maybe not ready to pay for lessons), this is a great way. They have many other languages, so check them out!
UPDATE: it is no longer a free site.