On various websites, the songs 絶望の箱 (Zetsubou no Hako) and "Think about death" are said to be from this band. That's not the case, they were released by a different band with the same name.
The order in which the band's demo tapes were released is not entirely clear. As drummer Shuu (愁) apparently seceded in December 1993, the demo tapes with his name in the lineup were most likely released between August and December, 1993.
Gesshoku (月蝕) forms.
On several releases, the band's name is written as 月蝕 -schwarz weiß-. It's unclear whether or not the band considered this part of their name, or just some sort of flavor text.
The vocalist's name is written as 妖磨 (Yoma) on some releases, but a handwritten text by him confirms that it's actually supposed to be 殀磨 (Yoma). It's also often mistakenly written as 殆磨 (Hotoma) on the internet.
At the end of August, Gesshoku distributes their first demo tape for free at Sports Valley Kyoto.
V. Yoma (殀磨) / G. LAYLLA / B. TOKUKO (忒己) / D. Shuu (愁)
Gesshoku debuts at Hirakata BLOW DOWN. The live is filmed for a VHS release. Yoma announces their appearance at Kyoto ROCK Tengoku on October 23, 1993 at this live.
A sticker was distributed at this live.
At some point in December 1993, likely shortly before the live on December 26, drummer Shuu secedes and the band uses a support drummer until their disbandment. This might've been MASA, as he is listed as the band's drummer on a flyer for the March 20 and April 11 lives. TOKUKO also changed his name from Kanji to Romaji around this time.
V. Yoma (殀磨) / G. LAYLLA / B. TOKUKO (忒己) / Support D. MASA(?)
Event takes place.
This lineup is shown on a flyer for the March 20 and April 11 lives. Notably, MASA is not said to be a support member.
V. Yoma (殀磨) / G. LAYLLA / B. TOKUKO (忒己) / D. MASA
Event takes place. TOKUKO announces his departure at this live. It's unknown if this was his last live or if he still played at the band's last live on April 11, 1994.
According to seine, the band's support drummer was called Shura and he played with them until their last live on April 11, 1994. As MASA is listed as the band's drummer on a flyer for the March 20 and April 11 lives, it's unclear how Shura fits into the lineup.
Gesshoku disbands after an activity period of only nine months. At their last live, they were joined by Rei (麗) during a session; he and Kyo go on to form Viṣṇu around May 1994. According to Kyo in SHOXX #70 (December 1998), he met Kisaki for the first time at this live.
Gesshoku (月蝕) disbands
These lineups were kindly provided by seine (Viṣṇu / Masquerade). According to him, these were the band's last two lineups, but as Shuu (愁) left the band in 1993 and Shuji doesn't appear in any known material, the exact circumstances are unclear. The lineups are listed for posterity's sake.
According to KISAKI's official biography, LAYBIAL and Gesshoku (月蝕) played together at Hirakata BLOW DOWN (枚方BLOW DOWN) on May 12, 1994. As Gesshoku (月蝕) had disbanded by this time, it's likely that KISAKI's biography has the wrong date (as some other lives were off by one or two days) or that the live was planned but cancelled (or even switched to Viṣṇu). Details are unclear.
Gesshoku (月蝕) was a visual kei band. They were active from 1993 to 1994 and are now disbanded.