Besides being established in the modern entertainment industry and considered a pop icon, Gackt's music has been used as theme songs for video games (Dirge of Cerberus: Final Fantasy VII), video game films (Dragon Age: Dawn of the Seeker), anime series/films (New Fist of the North Star, Mobile Suit Zeta Gundam, Texhnolyze and Trickster) and television series (Kamen Rider Decade).

In addition to his music career, Gackt has voice acted (including characters inspired by him in video games like in Bujingai and Genesis Rhapsodos in Crisis Core: Final Fantasy VII), and live acted in a few films, including a film he wrote, Moon Child, his international debut Bunraku, Japan Academy award nomination performance for Best Actor in Fly Me to the Saitama, and TV series most notably as Uesugi Kenshin in the NHK drama Fūrin Kazan.

He also performed live in theatre stage plays, Nemuri Kyoshiro Buraihikae and a duology he has written, composed, and directed Moon Saga: Mysteries of Yoshitsune I & II.

[14][16] As their vocalist, pianist and primary lyricist on studio albums Voyage Sans Retour (1996) and Merveilles (1998), he also contributed three songs in their catalog, "Regret", "Hamon" and "Le Ciel", the latter being their most successful single as a band.

It was Gackt's first single to reach number two spot on the charts, spent 17 weeks on them,[25] and managed to sell over two hundred and fifty thousand copies.

[50] In January 2005, Gackt released the single "Arittake no Ai de", which peaked at number seven,[25] and his fifth studio album, Love Letter, on Valentine's Day.

[73] On June 20, Gackt released his twenty-seventh single, "Returner (Yami no Shūen)", which was the first in his career (both solo and as a member of a band) to reach the number one spot on the Oricon charts.

[98][99] In commemoration of his 10th anniversary as a solo artist, Gackt released four singles: "Koakuma Heaven", "Faraway", "Lost Angels", and "Flower", one week after another, starting from June 17 and ending on July 1.

[25] On June 13, Gackt began the arena part of the tour, and on July 4 held a fanclub concert to celebrate his birthday at the Yoyogi National Stadium.

In March, his thirtieth single and the series' opening theme, "Journey Through the Decade", was released, peaking at number two and spending 25 weeks on the charts,[25] and certified platinum by RIAJ.

[113][114] On March 6 and 7, he performed the theme songs "Setsugekka (The End of Silence)/Zan" at the festival organized by Koei to promote their new Wii game, Samurai Warriors 3, at the Saitama Super Arena.

[117] Prior to the transferring to Avex, he organized a band project Yellow Fried Chickenz, whose name refers to human cowardice, that included Chachamaru and Shinya Yamada.

[144] It contained club remix versions of his songs done by Japanese DJs, including DJ Koo, Taku Takahashi, Tomoyuki Tanaka (FPM), Jazztronik, Marc Panther and many others.

[163] On December 31, Gackt sang the national anthem of Japan for the Japanese kickboxer Tenshin Nasukawa before his bout with American boxer Floyd Mayweather Jr. at the Saitama Super Arena.

[191] Gackt also assisted as a model and provided the voice and the motion capture for a main character Lau Wong in the video game Bujingai by Taito and Red Entertainment.

Thus his vision with female myth in mind, which presented him clean-shaven and with long hair, received harsh criticism, but Ken Ogata expressed his approval and supported Gackt's work in the drama.

[105] In 2008 and 2009 collaborated as an actor, with main character based on him and were used his songs in two slo-pachinko's, Yamasa Digi World SP Bounty Killer and Gladiator Evolution.

[205] He also voiced characters for two video games, Velskud in Dragon Nest,[206][207] for which he composed and performed the theme song, "Ever",[208] and pilot "Ex-" of Extreme Gundam the final boss in Mobile Suit Gundam: Extreme Vs..[209][210] In 2011, he was a voice actor for the sequel of the Tono to Issho anime series, Andy in Supernatural: The Animation (episode 21 first season),[211][212] and Dante in Sket Dance for which he also performed its theme "Graffiti" as well.

[214] He was also a voice actor of Knight Commander and theme song "Until The Last Day" performer for the video game animated film, Dragon Age: Dawn of the Seeker.

He was also seen in a dual role as a Professor of Neurology Shiki Takashi and Yumeoji (literally translated "Dream Prince") in the drama Akumu-chan, which is based on the novel Yume Chigai (夢違) by Riku Onda.

[220] In 2014, he repeated his role in the movie Akumu-chan,[217][221] and starred in the drama Time Spiral as a time-traveler university professor Shuya Tatsumi, based on the web novel Tokeru Rasen (解 け る 螺旋) by Eren Mizumori (水守恵蓮).

[228][229] The movie is set at the Yaeyama Islands of Okinawa, and Gackt portrays photographer Hikaru Ooyama who falls in love with a girl, Mami who mysteriously disappears.

[233][234] In August 2018, it was announced that Gackt will have a co-leading role as 18-year-old student Rei Asami in a live adaptation movie of the 1980s comedy manga Tonde Saitama (翔んで埼玉), written by Mineo Maya (魔夜峰央).

[273] His final performance of Diabolos tour in 2005 at Tokyo Dome (costing roughly $4.3 million[30]) received praise and shocked the audience,[65] as included entering the arena on a horseback in full gallop with four other horse riders,[91][274] in a suspended coffin during "Lust for Blood", singing "Love Letter" hanging 20m in the air, and disappearing in a sudden smoke explosion.

Party tour (2006-2007) featuring his rock songs,[76] with Oricon review noting his eroticism and charisma while performing,[75] and Gackt considering it his and worldwide's pinnacle of an all-out androgynous style by a man.

Music Champ, and since 2009, TV Asahi's New Year's special Geinoujin-Kakuzuke-Check (Celebrity Rating Check), where he holds the record of 71 individual winning streaks,[176][307] building an image of a top connoisseur and "first-class entertainer".

[334][335][336] In March, a truck convoy with 72,000 lb (33,000 kg) of food and clothes was delivered and a nationwide street-corner fund-raising campaign was held, with Gackt's participation,[337] which collected ¥25,234,490 (or US$320,193).

[334][339] Part of the 2011 world tour and other activities of Gackt's band project Yellow Fried Chickenz revenue was also donated to the Japanese Red Cross.

[340] At several theatre plays of his Moon Saga: Mysteries of Yoshitsune I (2012), with the help of the Ashinaga (organization), orphans from the earthquake were invited and also received a monetary donation for scholarship.

In 2012 he moved to the Philippines and Hong Kong,[355][356] with his primary residence located in Malaysia, where he has a mansion of 1,700 square meters situated in a residential area on the outskirts of Kuala Lumpur.