| 1993 | | Koichi started a solo unit chain letter. |
| 1996 | Dec. | Koichi established tulip house records to release chain letter's 7". |
| 1998 | Apr. | Chain letter did the first live performance. |
| 1998 | Apr. | Miki Ito started a solo unit called cherry honeymoon. In the same month, she released the 1st cassette medicine drink. |
| 1998 | Sep. | released chain letter' 1st CD theatral musical. In the same month, Miki released cherry honeymoon's 2nd cassette piano. |
| 1998 | Dec. | Cherry honeymoon did the first live performance. |
| 1999 | Feb. | Miki released cherry honeymoon's 3rd cassette picnic. In the same month, tulip house released a split 7" of cherry honeymoon and Kyosuke Azuma's solo unit fast car. |
| 1999 | March | Tulip house released a split 7" of chain letter and jenny on the planet. |
| 1999 | Nov. | Koichi and Miki started a band called cherry letter with drummer Masafumi Hiramatsu. |
| 1999 | Dec. | Koichi and Miki married. |
| 2000 | May | cherry letter's 1st 7" live was released from tulip house. They did the first live performance. |
| 2001 | Apr. | They did the last live performance in Nagoya. |
| 2001 | May | Cherry letter broke up. Koichi and Miki started a duo bitter cherry jam. |
| 2001 | Nov. | A split 12" of bitter cherry jam and cherry letter was released. They did live performance in Nara and Nagoya. |
| 2002 | May | Galaxy train label released bitter cherry jam's CDR departure. |
| 2002 | Nov. | Bitter cherry jam did a live performance in Tokyo supported by Osamu Shimada and Nobuaki Fukatsu of caraway, and Kouichiro Nakao of Apartment Star. |
| 2003 | Oct. | First full album restaurant (CDR) was released from tulip house. |
| 2003 | Dec. | I just want to call you up EP (CDR) was released from tulip house. |
| 2004 | | Live for love EP (CDR) was released from tulip house. |
| 2005 | Sep. | Like a show EP (CDR) was released from tulip house. |
| 2006 | Dec. | She is my POP star EP (CDR) was released from tulip house. |
| 2010 | Oct. | Takayuki Sekiya started to help bitter cherry jam as a drummer. They become a rock'n roll band. They did a live performance in Tokyo with pervenche and red go-cart. |
| 2011 | Apr. | They did a live performance in Nagoya. |
| 2012 | Nov. | bitter cherry jam album 2012 (CDR) was released from tulip house. |
| 2014 | Aug. | Takayuki Sekiya officially joined bitter cherry jam. The last part of bitter cherry jam started. "Where Does the World Exist?" cassette was released from galaxy train label. |
| 2015 | Jun. | "in your own space" cassette was released from galaxy train label. |
| 2016 | Dec. | The last cassette of bitter cherry jam "sayonara" was released from galaxy train label. |
| 2017 | Feb. | 1st cassette of the vegetablets "the vegetablets" was released from galaxy train label. |
| 2017 | Oct. |
2nd cassette of the vegetablets "2" was released from tulip house. |
| 2018 | Apr. | Tulip house released "the vegetablets" CD that includes all songs in 1st and 2nd cassettes. |
history