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| Key | Song | Notes | Artist |
|---|---|---|---|
| 41440 | [KR] Cube (【KR】cube) | DIR EN GREY | |
| 41224 | Kuchibiru (口唇) | GLAY | |
| 41119 | Kuchibue (口笛) | Mr. Children | |
| 41562 | Kuki (STEM) (茎（STEM）) | Ringo Sheena | |
| 41161 | Kurenai (紅) | X Japan | |
| 42264 | Kuroi Namida (黒い涙) | Nana ED3 | Anna Tsuchiya |
| 41705 | Kurumi (くるみ) | Koufuku na Shokutaku OST | Mr. Children |
| 42696 | Kuusou RUMBA (空想ルンバ) | (Zoku & Goku) Sayonara, Zetsubou-Sensei OP | Kenji Ohtsuki |
| 43464 | Kyoumu Densen (凶夢伝染) | Another OP | ALI PROJECT |
| 42957 | Lacrimosa | Kuroshitsuji ED2 | Kalafina |
| 26132 | Laki Sa Layaw | Mike Hanopol | |
| 26135 | Laklak | Teeth | |
| 41782 | Last Song | Gackt | |
| 42749 | Laugh away | YUI | |
| 43880 | Let It Go ~Ari no Mama de~ (Let It Go~ありのままで~) | Frozen Japanese OST | Takako Matsu |
| 43879 | Let Me Hear | Parasyte OP | Fear, and Loathing in Las Vegas |
| 42510 | Lie-Lie-Lie | Naruto Shippuden Movie OST | DJ OZMA |
| 41331 | Lies and Truth | L'Arc~en~Ciel | |
| 42527 | LIFE | Life OST | Mika Nakashima |
| 42386 | LIFE | Bleach ED5 | YUI |
| 41939 | Life is Like a Boat | Bleach ED1 | Rie Fu |
| 26322 | Ligaya | Eraserheads | |
| 21479 | Like a Virgin | Madonna | |
| 25458 | Linger | The Cranberries | |
| 41981 | Link | Fullmetal Alchemist Movie OP | L'Arc~en~Ciel |