4D-JAM

In June, Kenji was involved with music production as arranger for Zard's single Sekai wa Kitto Mirai no Naka along with Hirohito Furui and Yuuichirou Iwai from New Cinema Tokage.

In the same month, they released their first media song city of tracks which was used as ending theme for the DirecTV program Matsuo Kiyoshi Teki Ongaku Seikatsu.

In November, their fourth single Ma Life was commercially used as an opening theme for the Tokyo Broadcasting System Television program Kyaeen: Kanpei no Megami no Shinsou.

In March 2000, one year after major debut, their fourth single Wondering Hands had become their first anime song for the television series Monster Rancher.

In April 2001, Maho was involved with music production as a chorus member in The Tambourines debut single Easy game.

In August, Maho provided chorus support for the Mai Kuraki single Can't Forget Your Love.