Some of you might already know this but there was a pilot, that wasn't shown on tv but was a manga. In the Pilot they have a main character named Taro. The alias that Matsuda uses is Taro Matsui, he gets this name from the manga.

Here is the manga:discovery
If you don't trust me go to onemanga.com then go to manga list then Death note book 0, go to page 53.