NEEI is the sixth album by Masami Okui, released on August 23, 2000.
- Just Do It (NEEI mix)
- Lyrics: Masami Okui
- Composition, arrangement: Toshiro Yabuki
- M.M Family
- Lyrics: Masami Okui
- Composition: Toshiro Yabuki
- Arrangement: Masato Yamada, Toshiro Yabuki
- Cutie
- Turning Point (L.A version)
- Lyrics: Masami Okui
- Composition, arrangement: Toshiro Yabuki
- Sunrise Sunset
- Lyrics, composition: Masami Okui
- Arrangement: Itaru Watanabe
- Over the End
- Lyrics: Masami Okui
- Composition, arrangement: Toshiro Yabuki
- Monogatari (物語)
- Lyrics: Masami Okui
- Composition: Toshiro Yabuki
- Arrangement: Hideki Satou
- Chaos
- Lyrics, composition: Masami Okui
- Arrangement: Hideki Satou
- Hoka ni Nani ga... (物語)
- Lyrics: Masami Okui
- Composition, arrangement: Tsutomu Ohira
- Moon
- Lyrics, composition: Masami Okui
- Arrangement: Hideki Satou
- Sore wa Totsuzen yattekuru (それは突然やってくる)
- Lyrics: Masami Okui
- Composition, arrangement: Toshiro Yabuki
- Ajisai (紫陽花)
- Lyrics, composition: Masami Okui
- Arrangement: Tsutomu Ohira
- eternal promise (version 091)
- Lyrics: Masami Okui
- Composition: Masami Okui, Toshiro Yabuki
- Arrangement: Masami Okui
- Only One, No. 1
- Anime television series Di Gi Charat opening song
- Lyrics: Masami Okui
- Composition, arrangement: Toshiro Yabuki