Conversation so far:
What music has Ryuichi Sakamoto produced?
Ryuichi Sakamoto influenced and pioneered a number of electronic music genres. Merry Christmas, Mr. Lawrence (1983) marked his debut as both an actor and a film-score composer.
Did Ryuichi Sakamoto produce any other movie apart from Merry Christmas, Mr. Lawrence?
Ryuichi Sakamoto's most successful work as a film composer was The Last Emperor (1987).

Question: Who did he work with?
Self-contained rewrite: Who did Ryuichi Sakamoto work with on the movie The Last Emperor?