In January 1992, Ner-vous's drummer left and Kiyoshi Moro replaced him; however, he only had the chance to play with the band for two live shows before they disbanded.
In August 1992, Tetsu became vocalist of the visual kei rock band Malice Mizer, alongside Mana, Közi, Yu~ki and Gaz.
[1] Later that year the album would be released again as Memoire DX with the bonus track "Baroque", but at that point Tetsu had decided to leave the group.
While only eight Malice Mizer songs with Tetsu were recorded and released officially, nearly 10 more were written and performed by the band during that two-year period; these appear on a large number of bootlegs.
Rikiji has since become the only original member to stay in Mega8Ball and Tetsu has fondly referenced the band in online diary entries over the years.
He recruited Kashimoto and Moro, friends from his Ner-vous days, as support members and entered the studio, eventually creating 20 songs.
In January 2002, before Zigzo even finished touring, Tetsu decided to restart Nil and got in contact with Kashimoto, who rejoined the band as well; the first song they composed was "Mona Lisa."
While certain similarities in lyrical content and musical style exist between Zigzo and Nil, themes such as Humanity, Love, Peace, War, Life, and Death have a much greater roll in the latter.
The constant recording and performing seemed to have fatigued Kashimoto and Moro to the point where they both decided to leave Nil at the end of the "Covering Inferno Tour" on January 10, 2005.
While the reason for their departure is not known for sure, Tetsu and Nil recorded, released, and toured quite a lot compared to many other indie bands and it is possible that such a constant hectic schedule was too much for Kashimoto and Moro.
Whatever the reason may have been, Tetsu's ambitions for the band took a deep blow and Nil's second album Excalibur was completed during the turmoil and aftermath of their departure.
And so, the fourth stage of Nil had begun and the forming of a permanent lineup allowed the band more time to play together, try out new songs live, and record together at a somewhat slower pace.
Tetsu, ever ambitious, also decided to record on his own as a solo artist in May and August 2006 he released The Ball and Wall, featuring acoustic takes of many ballad and mid-tempo Nil songs and their two unreleased tracks, "Beautiful You" and "Hotel."
[5] However, Tetsu, Sakura, Ryo and Den performed a surprise set as Zigzo and announced that the band will officially restart activities at a concert on March 17, 2012 at Akasaka Blitz.
In 2015, Tetsu formed another band with Masaru Kobayashi, Kazama Hiroyuki and Hajime Sato, plus the addition of second drummer Jin Terui (Pulling Teeth).
Tetsu, Kobayashi and Terui formed the band Disco Volante with Tōru Yoshida (Preppy Boys Slippy) in February 2022.