Last year, Mr. Paul Graham's "On Lisp" was translated by Mr. Noda, and published from Ohmsha publishing co ltd. And last month, Peter Seinel's "Practical Common Lisp"was translated and published from Ohmsha, too. These books are aquiring a lot of new programmers to Lisp community. But, because of long time no publishment about common lisp, especially in Japan, there are no good reference, except above two books. Now People are demanding Japanese translation of Hyperspec, for learning. These demands push me to decide translation of it for this community.