SiM was founded by MAH in November 2004 in Shonan, Kanagawa Prefecture, Japan. The band consisted of MAH on vocals and guitar, KAH on bass guitar, and way on drums. At the beginning of the formation, they called the three piece band as "Silence iz Mine". In 2006, SHOW-HATE joined and picking up guitar. KAH left the band then BUN joined on bass until 2008.
2007–2009: New Formation and ''Silence iz Mine''
In 2008, the band released their first full album entitled Silence iz Mine. In the same year, they performed for the first time in Kyoto. In 2009, WAY left the band then SiN and GODRi joined the band. SiN picking up bass while GODRi took way's place on drums.
2010–2012: ''Seeds of Hope''
In 2010, the band released their single "Anthem" under Tower Records label and did their tour. During the tour, SHOW-HATE collapsed with cerebral infarction that caused the sudden tour cancellation. While waiting for recovery, ONO-SHiT followed as a support member on guitar. On October 6, 2010, the band's first mini album LIVING IN PAiN released. In 2011, their second full album Seeds of Hope was released. On May 2, 2012, the band released their second mini album LiFE and DEATH. In this year, they performed for the first time at Summer Sonic Festival 2012.
2013–2015: ''Pandora''
In 2013, they joined Monster Energy Outburn Tour 2013 with coldrain. The band moved to Universal Music Japan and made a major debut with single "EViLS" on April 3, 2013. On October 23, they released the first albumPandora since their major debut, and peaked at fifth in the Oricon weekly chart. In 2014, the band held a one-man performance at Shinkiba Studio Coast. Their third mini album i AGAINST i was released. Their single "EXiSTENCE" peaked at #20 on BillboardJapan Hot 100 while "CROWS" reached #18 on Billboard Japan Hot 100 and stayed for 2 weeks. On November 4, 2015, SiM performed at Nippon Budokan which was their THE TOUR 2015 FiNAL -ONE MAN SHOW at BUDOKAN. Tickets were sold out.
2016–2018: ''The Beautiful People''
On April 6, 2016, the band's fourth album The Beautiful People was released. On May 6, 2016, they appeared on Fuji TV series HEY! HEY! NEO! with "MAKE ME DEAD!". On May 11, 2016, SiM released the live DVD WHO SAYS WE CAN NOT of their performance at "The Tour 2015 FiNAL -One Man Show at Budokan, ranking fourth on the Oricon weekly DVD chart and fifth on the Blu-ray chart. On September 25, SiM performed for the first time in the USA as a part of Ozzfest meets Knotfest. On October 16, the final performance of the tour "SiM THE BEAUTiFUL PEOPLE Tour 2016 Grand FiNAL Dead Man Walking" was held at the Yokohama Arena. On February 22, 2017, SiM performed as the opening act on "2017 ONE OK ROCKAmbitions Japan Tour" at Wakayama Big Whale. On April 7, 2017, the song "Let It End" was used as the opening theme for the anime Shingeki no Bahamut: Virgin Soul. On December 6, 2017, SiM released their seventh single "A / The Sound Of Breath", which was used as in the soundtrack for the video game Yakuza Kiwami 2. On November 20, 2018, the band released the single "Diamond". On December 12, 2018, the band released the single "Lion's Dens", which was used as the opening song for Japan's Wrestle Kingdom 13.
2019-''present'': ''Thank God, There are Hundreds of Ways to Kill Enemies''
On November 3, 2019, the band released the single "Sand Castle" with AKKOGORILLA. On January 30, 2020, the band announced their new album Thank God, There Are Hundreds of Ways to Kill Enemies would be released on April 15, 2020. On February 11, 2020, the band released the single "Bully". On March 17, the band released the single "Devil in Your Heart". On March 31, the single "Baseball Bat" was released. In April 2020, the band announced that the album's release date had been postponed to June 17, 2020. On May 11, the band released the single "Captain Hook".
