I love them! They're a band from Japan. It stands for Japan Animation Music. Or something lol.

These are some songs by them:
"Gong" - my first song
JAM Project - [GONG] - YouTube

"Skill"
Jam Project - SKILL Lyrics - YouTube

"Victory"
VICTORY - Jam Project - YouTube

"Omoide wa Okkusenman"
Jam Project - Omoide wa Okkusenman! - YouTube

"Maxon"
JAM Project - [MAXON] - YouTube

"Battle Communication"
JAM Proejct - [Battle Communication!!] - YouTube

"Lady Fighter"
JAM Project - [LADY FIGHTER!] - YouTube

"Little Wing"
Scraped Princess OP - Little Wing - YouTube

They only have TWO songs in English.

"No Border"
JAM Project NO BORDER (English version) - YouTube

"Hero"
JAM Project - [Hero] (English) - YouTube

Finally!!
Someone who knows about JAM!!
-hugs you-

I have never heard of JAM project before, but i listened to all of the videos you posted here, and...i love them!
Holy crap, they are so awesome. I loved Skill especially, then Gong after that XD.
Thank you for posting this, you've made my day/morning/night (it's 1:30 AM here)