Ju-ken

• Name — Ju-ken • Alias — Date • Born — 27 June 1971 • Origin — Funabashi, Chiba, Japan • Instrument — Bass, contrabass • Genre — Alternative rock, hard rock, pop punk, pop rock, pop • Occupation — Session musician, bassist • Years Active — 1998–present • Website — http: ju-ken.velvet.jp/

Ju-ken started his professional career when he was 26 as a member of the band Nitro alongside By-Sexual drummer Nao and Ilmari of Rip Slyme. In 1998, he played bass on the first disc of Heath first full-length studio album, Gang Age Cubist. Ju-ken supported the supergroup S.K.I.N. at their only concert in 2007, and participated in Gackt's 2008-2009 «Requiem et Reminiscence II 〜再生と邂逅〜» tour. In 2017, he formed the band Sengoku Jidai: The Age of Civil Wars, where he uses the name "Date", with Kazuma and Jun-ji of Siam Shade and Jurassic vocalist Yu+ki. Ju-ken began working with a third Siam Shade member in 2025, when he formed a duo with Natchin, where they both play bass and sing.

• Anna Tsuchiya Inspi' Nana (Black Stones) (CD+DVD) (2007) • Bubble Trip/Sweet Sweet Song (CD+DVD) (2007) • Anna Tsuchiya feat. AI - Crazy World (CD+DVD) (2008) • Nudy Show! (2008) • 1st Live Tour Blood Of Roses (DVD) (2007)

• Live 2005 Total Tone DVD (2005)

• Crescent (2003) • 7th night ~unplugged~ (2004) • Love Letter (2005) • Diabolos (2005)

• Todokanai ai to shitteita no ni osaekirezu ni aishitsuzuketa (2005) • Metamorphoze (2005) • BLACK STONE (2005) • Love Letter (2006) • Redemption (2006)

• Live Tour 2004 The Sixth Day & Seventh Night~Final~ (2004) • DIABOLOS ~Aien no Uta~ in Korea (2006) • Live Tour 2005 DIABOLOS ~Aien no Uta to Seiya no Namida~ (2006) • Greatest Filmography 1999-2006 ~Red~ (2007) • Greatest Filmography 1999-2006 ~Blue~ (2007) • Training Days 2006 Drug Party ~ Zepp Tokyo Live (2007) • Training Days in Taiwan Drug Party Asia Tour (2007) • Training Days in Korea Drug Party Asia Tour (2007) • Nine*Nine (2008) • Platinum Box V (2004) • Platinum Box VI (2005) • Platinum Box VII (2006) • Platinum Box VIII (2008) • Platinum Box IX (2009)

• MONSTER DRIVE PARTY!!! (2005) • All Time Super Best Tour (2006) • Super Soul Sessions (2007) • Hotei and The Wanderers — Funky Punky Tour 2007-2008 (2008)

• ニライカナイ (Niraikanai) (CD+DVD) (2007)

• 夜露死苦哀愁 (CD) (2007) Music author for «M-2.die in peace» (track 2 on the album)

• Beast (2010)

• Love Addict (CD+DVD) (2008)

• Vamps Live 2008 (2009) • Vamps Live 2009 U.S.A. (2010) • Vamps Live 2009 (2010)

Ju-ken primarily uses handmade Sugi and vintage and custom shop Fender basses

• Sugi Burst • Sugi Tiki • Sugi Nero • Sugi Daruma • Sugi Spiderman • Sugi Bel Verde

• Fender American Deluxe Jazz Bass (at least 2 of them) • Fender '65 vintage Jazz Bass • Fender '73 vintage Jazz Bass • Fender '73 vintage Precision Bass • Fender '78 vintage Precision Bass • Fender Precision Bass (current model) • Fender Custom Shop Jazz Bass

• Spector NS-2 • Musicman Stingray • Michael Kelly Dragon Fly acoustic Bass

• Paul Reed Smith Singlecut/20th Artist Package Guitar • Unidentified Contrabass

• Fender 400h head • Fender 810 Pro Enclosures cabinet • MarkBass Mini Cmd 151p combo

• Fostex FR-2LE Field Memory Recorder • Fostex MC11S Stereo Microphone • Fostex T50RP Headphones