J ranked tenth on Bass Magazine's list of the 100 Greatest Bassists, and Luna Sea are regarded as one of the most influential bands in the visual kei scene.

[1] Musicians such as Shun (Totalfat), Ni~ya (Nightmare), Reita (The Gazette), and RxYxO (Coldrain) have cited him as an influence.

Since 1997, J has had prominent names in the music industry playing on his albums, as his backing band, or appearing as guests at his concerts, including Scott Garrett, Billy Duffy and Ian Astbury (all three from The Cult), Franz Stahl (Foo Fighters), Steve Jones (The Sex Pistols), Duff McKagan and Slash (both from Guns N' Roses), and Takashi Fujita (Doom).

They went on to become very successful, having sold more than 10 million certified units in Japan, and are considered one of the most influential bands in the visual kei movement.

In 2003, HMV Japan ranked Luna Sea at number 90 on their list of the 100 most important Japanese pop acts.

When Luna Sea took a brief break in 1997, J signed with Universal Music Group and began a solo career.

[5] His first single, "Burn Out", was released on June 25 and contained a cover of the Blondie hit song "Call Me".

[5] J participated in the making of South Korean musician Seo Taiji's 2004 album 7th Issue, by playing bass.

J covered Buck-Tick's song "Iconoclasm" for their tribute album, Parade -Respective Tracks of Buck-Tick-, which was released on December 21, 2005.

[11][15] On December 24, 2007, J reunited with Luna Sea for their concert God Bless You ~One Night Dejavu~ at the Tokyo Dome.

[16] The band would reunite and perform again at the hide memorial summit on May 4, 2008, along with X Japan, Oblivion Dust, Takanori Nishikawa, and many more.

In August 2010, he appeared with the other members of Luna Sea at a press conference in Hong Kong, where they officially announced their reunion and their 20th Anniversary World Tour Reboot -to the New Moon-.

[17] To celebrate his 14-year anniversary as a solo artist, J released the self cover album Fourteen -The Best of Ignitions- in January 2011.

[18] The production ran from March 8 to the 27 at the Tokyo Globe Theater and was then brought to Fukuoka, Kobe, Nagoya, Niigata, Sendai, and Sapporo in April.

[19] From May 5 to 9, J held five consecutive concerts at Shibuya-AX titled J 14th Anniversary Special Live Set Fire Get Higher -Fire Higher 2011-, each day with different bands such as Mass of the Fermenting Dregs, Nothing's Carved in Stone, Avengers in Sci-Fi, Pay Money to My Pain and The Hiatus.

[22] His former support guitarist masasucks appears on the album, as does drummer Masuo Arimatsu from Back Drop Bomb.

[23] Takashi Fujita, J's backing guitarist since he launched his solo career in 1997, retired at the end of the year and masasucks officially returned in his place.

"[3] J has no interest in music where the bass is loud and stands out, or in playing meaningless solos to grab attention.

[36] This originated with the first song[a] of his first solo album, both of which are titled "Pyromania" after a prank he pulled as a young boy.

[40][41] Musicians that have cited J as an influence include, Ni~ya of Nightmare,[42] Natsuki of DuelJewel,[43] Totalfat bassist Shun,[44] Xaa-Xaa's Reiya,[45] and Yu-ki of Noisemaker.

It has a reverse headstock, a 1.65 inch nut width, a one-piece maple neck, and an ash body.