幸福指数 (Koufuku Shisuu) is 40meterP's long-awaited third doujin album. It contains tracks, sung by Hatsune Miku and GUMI. Featured is one of 40mP's best known hits, "Shiryoku Kensa". The mastering was done by Signal-P. It was first released at THE VOC@LOiD 超 M@STER 20.

A crossfade of the album can be heard on Niconico.

The album is purchasable on Amazon and Toranoana.

40mp koufuku shisuu
Released April 28th, 2012
Producer 40meterP
Price ¥1,000
Illust. arico. & guitar
Track list
1. equal
2. 幸福指数
Koufuku Shisuu / Happiness Index
Hatsune Miku, GUMI
3. シリョクケンサ
Shiryoku Kensa / Eyesight Test
4. ヤクソクの種
Yakusoku no Tane / Seeds of Promise
5. 存在証明書
Sonzai Shomeisho
Hatsune Miku
6. パラメタ
Hatsune Miku
7. ナケナシノチカラ
Nakenashi no Chikara / My Tiny Amount of Strength
Hatsune Miku
8. 春に一番近い街
Haru no Ichiban Chikai Machi / The Town Nearing Spring
9. unknown line
40mp chiisana jibun to oukina sekai
小さな自分と大きな世界 (Chiisana Jibun to Oukina Sekai)
Exit tunes presents 40mP
Shintai Sokutei

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