Major corporate / institutional clients include:

Apple Corps Ltd • Baker Botts LLP • BBC • British Museum • British Telecom • Channel 4 • Dentsu • De Pinna Notaries • DTI (now the BIS) • European Patent Office • Fuji TV • Hakuhodo • Henry Moore Foundation • Japanese Embassy • Japan Foundation • Marconi • National Film Theatre • NHK • Nomura Research Institute • NTV • RIBA  • Royal Academy • RWS Translations • Saatchi & Saatchi • Simmons & Simmons • Takarazuka • TBS  • Travers Smith Braithwaite  • TV Asahi  • TV Man Union • Universal Grinding

Some of the more well-known individuals Simon has worked for and with include:

Gerry Adams, Tadao Ando, Mira Anju, The Marquess of Bath, Matthew Bourne, Dame Barbara Cartland, Prince Charles, Tetsuya Chikushi, Eric Clapton, Sir Terence Conran, Adam Cooper, Hiroyuki Eihara, Uri Geller, Jane Goodall, Peter Greenaway, Katherine Hamnett, George & Olivia Harrison, Ken Kaiko, Kaoru Kanetaka, Tetsuko Kuroyanagi, Itchiku Kubota, Stanley Kubrick, Tetsuya Kumakawa, Sean Lennon, Sir Paul McCartney, Amon Miyamoto, Issey Miyake, Ganjiro Nakamura, Shido Nakamura, Yukio Ninagawa, Yuji Oda, Yoko Ono, Sir Simon Rattle, Lord Rees-Mogg, Sir Richard Rogers, Ryuichi Sakamoto, Sir Nic Serota, SMAP, Sting, Ringo Starr, Yoko Shimada, Sir Georg Solti, Seijun Suzuki, Soichiro Tahara, Beat Takeshi, Shuntaro Tanikawa, Shinya Tsukamoto, Tomoko Yamaguchi, Senri Yamazaki, Frank Zappa