1998 Kosei Tsuji 50 years of creation “TSUCHI TO HONOU”, special 
exhibition at BMW Square
1999 Kosei & Koji Tsuji “FROM FLAME TO FLAME” at Davidoff 
boutique, Hotel New Ohtani
2000 Exhibition “Universe ?GLOBALIZATION” at Sunroser Akasaka
2001 Kosei & Koji Tsuji at Cassina Interdecor new building, Spazio 1
2001 Kosei & Koji Tsuji at Cassina Interdecor, Aoyama showroom.
2002 Koji Tsuji  “Audi MUSIC MEETS ART” (arTT car by Koji Tsuji) 
at Hakone Open Air Museum
2003 “BOUCHUKAN” special exhibition at Tokyo National Modern 
Museum, Aqua
2003 “ACANTA Boutique” opening commemorating exhibition at 
Imperial Hotel
2004 Exhibition site direction for Kosei Tsuji’s Exhibition 
“LOVE” at Aoyama Spiral
2004 Exhibition “Untitled” at Aoyama GARGERY HOUSE
2004 Exhibition “GLAMOROUS” at Tokyo American Club
2004 “BOUCHUKAN” special exhibition at Tokyo National Modern 
Museum, Aqua
2004 Exhibition “ASTRO” at LION HEART, Osaka HILTON Plaza West
2004 Koji Tsuji’s jewelry line “ASTRO collection” at LION HEART, 
Osaka HILTON Plaza West
2005 Exhibition “BLOSSOM” at 30 shops in Sunroser Akasaka
2005 Jamiroquai and Lion Heart collaboration Jewelry designed by KOJI 
TSUJI released at DUO MUSIC EXCHANGE, Jamiroquai Official Fan Club site
2005 Designed Jewelry for Jamiroquai’ s new album “Dynamite” 
launching commemoration novelty at HMV, Tower Records, and Shinseido 
(with color variations for each store)
2005 “BOUCHUKAN” special exhibition at Tokyo National Modern 
Museum, Aqua