Haru —— the Japanese version of Twitter?

Haru is a service that has just launched in Japan. Personally, I feel that its functions are quite similar to Twitter's. It also allows you to broadcast short messages to your friends and supports mobile applications as well. For an introduction to Twitter, everyone can take a look at this translated article. However, I personally feel that Haru's current functions are not yet as complete as Twitter's, but perhaps it will gradually improve in the future. If you don't mind Japanese, you can keep an eye on this Web 2.0 site.