is a Japanese idol, singer, actor, singer-songwriter, composer, lyricist, television personality, voice actor. Along with Tsuyoshi Domoto (with whom he has no blood-relation), he is a member of the duo Domoto, who holds the Guinness World Records for having the most consecutive No.1 singles since debut and the most consecutive years with a Japanese No.1 single, and with whom is one of the top 25 best-selling artists of all time in Japan.
Although Domoto also actively works as a television actor and host, he is most famous for his musical SHOCK series, which he participates as the lead actor and director at the same time. SHOCK series started at the Tokyo Imperial Theatre in 2000, making him the youngest Zachō (chairman and lead role) and the first idol to perform at Imperial Theatre. With over 2000 performances, SHOCK series is now the most-performed musical and the second most-performed theatre with a single-lead in Japan. In 2018, he starred in the musical Knights' Tale directed by John Caird as well.
Domoto will be under agent contract in Starto starting in July 2026.
Career
Born in Ashiya, Hyōgo, Japan, Domoto joined the Japanese talent agency Johnny & Associates at the age of 12 after his sister sent in his application without his knowledge. Domoto and his bandmate Tsuyoshi Domoto first worked together as back-dancers for Hikaru Genji, who were holding a concert at Yokohama Arena, and has since then been partnered up for magazine photoshoots, music acts and drama projects. The duo eventually made their debut in 1997 with a double release of a single Garasu no Shōnen and an album A Album, both of which went on to sell over a million copies.
After Domoto, the group, leaves Starto on July 21, 2026, when their agent contract ends, to pursue a career as a self managed group, Koichi is to remain under an individual agent contract in Starto for individual activities.
Theatre In 1993, Domoto played in his first stage in SMAP's ANOTHER. As early as in 1994, he expressed his enthusiasm of musical, saying that his dream was to "play in musicals that have singing, dancing and acting" in an interview. In 1997, he played in the stage kyotokyo with many others from Johnny & Associates. He managed to star as the lead (or Zachō in Japanese) in musical MASK'99 in Nissay Theatre in 1999.
In November 2000, Domoto played the lead role in musical MILLENNIUM SHOCK, becoming the youngest Zachō and also the first idol to play the lead at Tokyo Imperial Theatre. Since then, SHOCK series has continued to perform every year. The title was changed to Shōgeki・SHOCK, SHOCK is Real SHOCK and Shocking SHOCK in the following years but had the similar story. In 2005, it was revised to Endless SHOCK and the story was changed completely. Domoto started to participate as the director and composed several songs since this year. In April 2008, the long-running musical Endless SHOCK was awarded the Grand Prize of the 33rd Kazuo Kikuta Drama Awards for theatre. In January 2012, Endless SHOCK was performed at Hakata-za in Fukuoka, which was the first time for the musical to be performed in places other than Tokyo. On March 21, 2013, Endless SHOCK welcomed its 1000th performance, making it the forth theatre to reach 1000 performances in Japan. It was also brought to Umeda Arts Theatre in Osaka in September 2013. After its 1408th performance on October 26, 2014, Endless SHOCK overtook Matsumoto Hakuō II's Japanese version of Man of La Mancha to become the most-performed musical and the second most-performed theatre with single lead-starring in Japan. In April 2020, Domoto alone was awarded the Grand Prize of the 45th Kazuo Kikuta Drama Awards for his achievement for leading SHOCK series for twenty years, becoming the youngest single winner of this award. The premiere of MILLENNIUM SHOCK in 2000 at Imperial Theatre was controversial since it was also the first time a theatre from Johnny & Associates was performed there. It was believed that idols were unqualified to stand at the most famous and important theatre in Japan, let alone playing the lead at the age of 21. However, SHOCK gradually becomes one of the most important musicals at Imperial Theatre and one of the representing Japanese original musicals. SHOCK series reached its 1800th performance on February 12, 2021, reaching the 2000th in 2024.
After the success of SHOCK, Domoto took over the position of director of another musical in 2019. DREAM BOYS, produced by Johnny & Associates and starring Domoto's junior colleagues, has been on stage for more than 20 years.
In November 2010, he appeared in stage production of Shichinin no Samurai, an adaptation of Seven Samurai, produced by Kansai Yamamoto.
In 2018, Domoto became the fourth person in 26 years to play a lead for four months in a year at Imperial Theatre, by starring in Endless SHOCK from February to March, and playing Arcite in John Caird's musical Knights' Tale, an adaptation of William Shakespeare's The Two Noble Kinsmen, from July to August.
Acting After joining Johnny & Associates, Domoto played his first role in movie 200X Nen Shō in 1992 and first role in drama Aiyo Nemuranaide in 1993. From July 1994 to September 1994, Domoto and his bandmate Tsuyoshi appeared in drama Ningen Shikkaku, which had a peak rating of 28.9% on its final episode. In 1994 and 1995, he starred as the main male role in move Ie Naki Ko and the drama Ie Naki Ko 2, which had a rating of 31.9% on its final episode. He gained unprecedented popularity through these works even though he had not formally debuted as KinKi Kids. From January to March 1996, he played two roles, Ginrō Fuwa and Kōsuke Fuwa, in drama Ginrō Kaiki File: Futatsu No Zunō Wo Motsu Shōnen, which had an average rating of more than 20%. He also starred together with his bandmate Tsuyoshi for their second drama together in Wakaba No Koro in 1996.
On August 23, 1997, Domoto starred in his first drama after debut in Yūki To Iu Koto, as a special drama corner of NTV's annual telethon 24-Hour Television, in which KinKi Kids were also appointed as the main host. The drama had a rating of 26.3%, becoming the highest rated 24-Hour Television special drama at the time, and it is still the second highest one until now. From October to December 1997, Domoto and his bandmate Tsuyoshi Domoto was both starred in their third drama, called Bokura no Yūki Miman City. Since then, Domoto stars one drama every year, which all received relatively high ratings. He shifted his focus to musicals after starring in Remote from October to December 2002, where he won the 'best supporting actor' in the 35th Drama Academy Award.
In 2006, Domoto starred in his first drama in four years as the lead in Kinō Kōen, which was part of TV special Tales of The Unusual 2006 Autumn Special Drama. In July 2007, Domoto starred as the lead in a drama entitled Sushi Ōji!, where he played the role of a martial artist training in the art of sushi. In addition, the sequel movie Ginmaku Ban Sushi Ōji!: New York e Iku was released on April 19, 2008. It was his first movie appearance since the 1994 movie Ienaki Ko.
On March 7, 2015, Domoto played Kazumi Ishioka in his first drama in nearly eight years in Tensai Tantei Mitarai Nankai Jiken File: Kasa o Oru Onna, which was an adaptation of Soji Shimada's Detective Kiyoshi Mitarai Series. On September 13, 2015, he played Minamoto no Hiromasa in Onmyōji. To commemorate the 20th anniversary of KinKi Kids, the sequel of 1997 drama Bokura no Yūki Miman City was broadcast as a special drama Bokura no Yūki Miman City: 2017 in NTV, where Domoto reprised his role.
Music In the early days after KinKi Kids debuted, Domoto had several solo songs credited as KinKi Kids in their albums. He held his first solo concert tour in 2004, mainly performing his solo songs in group albums and songs from SHOCK. On January 11, 2006, he released his first CD album Koichi Domoto「Endless Shock」Original Sound Track, but was not regarded as his solo debut. The album peaked in Oricon and became the first musical soundtrack album to reach No.1, winning the Soundtrack album of the year in 21st Japan Gold Disc Award. He made his official CD debut on July 12, 2006, with a release of single Deep in your heart/+MILLION but -LOVE, followed by the release of album Mirror on September 13.
On April 30, 2008, Domoto released a new single No More under the name of "Tsukasa Maizu"; the character he played in Sushi Ōji!, as the theme song of the movie Ginmaku Ban Sushi Ōji!: New York e Iku. His second single Ayakashi was released on July 29, 2009. On September 1, 2010, Domoto released BPM, his first solo album in four years. On October 3, 2012, Domoto released his third solo album Gravity, which ranked the first in Oricon. Domoto released his first DVD/Blu-ray single INTERACTIONAL/SHOW ME UR MONSTER on June 10, 2015, followed by his fourth solo album Spiral on July 8. On April 19, 2017, the second original soundtrack of his musicalEndless SHOCK was released. On June 2, 2021, Domoto released his fifth solo album PLAYFUL and topped in Oricon. The album also featured a collaboration short movie made by Square Enix, in which Domoto himself and a CG version of him starred together.
Domoto wrote his first song in KinKi Kids's music variety LOVE LOVE Aishiteru in 1997, where they were required to learn guitar and write songs. Since then, he wrote a great number of songs, mainly devoted to the group, his solo work and musical SHOCK. He composed several No.1 winning singles for KinKi Kids and himself, such as Suki ni Natteku Aishitteku (2000), Deep in your heart (2006), Family ~Hitotsu ni Naru Koto (2010) and Topaz Love (2018). In 2002, Domoto wrote the lyrics for and composed KinKi Kids' single Solitude ~Hontou no Sayonara~, which was also the theme song for his drama Remote, under the pen name "K．Dino". The single also reached No.1 in Oricon and won the best theme song in the 35th Drama Academy Award. The song Ai no Katamari of KinKi Kids he composed in 2001 was voted as the most loved song by fans in an official voting held for creation of KinKi Kids's 10th anniversary compilation album 39 in 2007. He composed various songs used in his musical Endless SHOCK. Domoto has also provided songs for other artists from Johnny & Associates, such as NEWS, Hideaki Takizawa, and the musical DREAM BOYS.
Discography
Studio albums +List of studio albums with peak chart positions Title Album details Peak chart positions JPN KOR Mirror Released: September 13, 2006 Label: Johnny's Entertainment 1 — BPM Released: September 1, 2010 Label: Johnny's Entertainment 2 21 Gravity Released: October 3, 2012 Label: Johnny's Entertainment 1 — Spiral Released: July 8, 2015 Label: Johnny's Entertainment 2 — Playful Released: June 2, 2021 Label: Johnny's Entertainment 1 — Raise Released: September 10, 2025 Label: ELOV-Label 1 —
Soundtrack albums +List of soundtrack albums with peak chart positions Title Album details Peak chart positions JPN Endless Shock Original Sound Track Released: January 11, 2006 Label: Johnny's Entertainment 1 Endless Shock Original Sound Track 2 Released: April 19, 2017 Label: Johnny's Entertainment 1
Singles +List of singles with peak chart positions Title Year Peak chart positions Album JPN "Deep in your heart/+MILLION but -LOVE" 2006 1 Mirror "No More" 2008 1 Sushi Ōji! Soundtrack "Ayakashi" () 2009 1 BPM
Video albums +List of video albums with peak chart positions Title Album details Peak chart positions JPNDVD JPNBlu. Koichi Domoto Live Tour 2004 1/2 Released: October 14, 2004 Label: Johnny's Entertainment Formats: DVD, VHS 1 — Koichi Domoto Concert Tour 2006 Mirror: The Music Mirrors My Feeling Released: May 16, 2007 Label: Johnny's Entertainment Formats: DVD 1 — Koichi Domoto Concert Tour 2010 BPM Released: March 9, 2011 Label: Johnny's Entertainment Formats: DVD, Blu-ray 1 8 Koichi Domoto Concert Tour 2012 "Gravity" Released: July 3, 2013