Claim: Chihiro Fujioka, who was a director of Super Mario RPG, worked with Sasai on the soundtrack of Final Fantasy Legend III, as a composer for Final Fantasy Mystic Quest.
Evidence: He has worked at Xtalsoft, Square, and AlphaDream where he is primarily known for directing Super Mario RPG as well as his involvement in several Mario & Luigi games. His first work with Square was as director of Final Fantasy Legend III on which he work with Sasai again on the soundtrack. His third involvement with Sasai was on Final Fantasy Mystic Quest with Sasai as sole composer and Fujioka writing. 
His most prominent role was as director of Super Mario RPG. His first work with Square was as director of Final Fantasy Legend III on which he work with Sasai again on the soundtrack. His third involvement with Sasai was on Final Fantasy Mystic Quest with Sasai as sole composer and Fujioka writing. 
Ryuji Sasai
Yasuhiro Kawakami He has worked at Xtalsoft, Square, and AlphaDream where he is primarily known for directing Super Mario RPG as well as his involvement in several Mario & Luigi games. His first work with Square was as director of Final Fantasy Legend III on which he work with Sasai again on the soundtrack.