I think it's taken from a book.
Japanese part says
Memo 287 "The Boy With The Gun" David Sylvian
handwritten lyrics * Sakamoto Ryuichi Arrange Idea Memo
I start to wonder who wrote this memo. David or Ryu? (I'm sure some Japanese part was written by ryuich)
I don't have that book, but I guess the book might be "Sakamoto Ryuichi - Zenshigoto" (The Sketchbook of Ryuichi Sakamoto)(hardcover, published in 1991 and 1998, but hard to get it now)
http://www.amazon.co.jp/%E5%9D%82%E6%9C ... 285&sr=1-8
according to index, (
http://www.amazon.co.jp/gp/reader/48723 ... eader-page) you see "Memo 280 - 291" that might be it