Item Idem: very substantial, very demi more.
Cyril Duval (born December 31, 1977), who works under the name Item Idem, is a French conceptual artist, designer, and filmmaker. He lives and works in Taipei. Duval studied for six years at the École nationale supérieure d'arts de Paris-Cergy, he moved to Tokyo in 2004. In the same year, Duval was discovered by Sarah Andelman, the creative director of Colette. The Paris-based boutique teamed Duval up with the Japanese fashion label Comme des Garçons in Tokyo. He began to incorporate interior design and conceptual installations.