Credit Bureau System in Japan

Do you know the Annual Recommendations between USA and Japan? The latest USA version was released in October 2008. The US Government has recommend to introduce on the credit bureau system in Japan. If you've been in USA, you could know the credit score very well.
However, if you were a Japanese, you might not know it well. I thought it'd no problem for me because I've not use credit cards so much and I've never brought cash on credit except my housing loan, but it's on the Japanese common sense. The credit score on the US common sense could be risen after I use credits  as much as possible. The credit bureau system must be introduces in Japan in the near future. I should take care of my credit score.