Focus on a producer: 人生P (JinseiP)
JinseiP has been making songs with Luka for about as long as Luka has been around; JinseiP's first song with her was posted on May 5 2009. From his (or her) occasional twitter posts, JinseiP has a great deal of admiration and respect for Luka. You can download most (all?) of his songs from
Piapro. Here are some of my favorite songs.
M.I.J (Moe Is Justice)
A lovely Project DIVA F2 edit with Luka in her sexy Witch-girl outfit.
seisai
A song JinseiP made for Luka's 7th anniversary. I'm told that the song is about her, but I'm also told that the translation is basically impossible.
seisai was also released as part of KARENT's Luka 8th anniversary celebration, so you can buy it on iTunes, etc. As far as I know, it is the only song that JinseiP has made available for sale.
Summer Kills Me
I think this was JinseiP's first song with Luka V4X English
Advance
Another song with Luka V4X English