[806mtson]

Now, I am not sure about most of the parts, but here is the basics.

Kamen Rider DJ
Kamen Rider DJ is the classic civilian by day, hero at night trope. Except he is a rather famous DJ.
Using the DJ Discs and the DJ-river, he becomes Kamen Rider DJ. The DJ Discs are put onto the DJ-river's Turntables to get new forms. Each form is based upon Music Genres (Pop, Classical, Heavy Metal, Disco, Hip Hop, etc). There are two main types of DJ Discs, Rider Discs and Music Discs. The first slot is where the Rider Discs go and the other slot is where the Music Discs go. It works sort of like a combination of Gaim, Ghost, Ex-Aid, and Zi-O with Main Rider Forms and Armor. The Labels on the DJ Discs show the form on them. DJ's Main Rider Disc plays his Show Theme. For The Legend Rider Discs, each of them plays the main theme for that Rider (like EXCITE for Ex-Aid). They are all Rider Discs and give them Forms based upon that Rider. The Two Discs play two songs, the Rider Song and the Music Song. The Music Songs are based upon the Style from the name of the Disc. You scratch the discs to use the attacks and scratch both to do the finisher.

The Main Weapon is the Boosted Buster. It transforms from the Bass-Boosted Blaster and the Treble Boosted Blade. They both boost the Bass or the Treble of the Disc put into it.

The Rider Machine transforms from a DJ Turntable to the DJ Motor.

I think there should be a Secondary Rider called Kamen Rider Mixtape who uses Cassette Tape-based Collectable Devices which I don't know what the name of them will be.

Most people don't know that the identity of Kamen Rider DJ is that famous DJ.

This was just a brief summary. I may add more, later.