At first, the main system is binary whichis used Cubi.This is my most important system. Secondly, the wood inlay which was made by Haruo Uchiyama is the only one.It's not a pasted wood inlay like traditional trick boxes in Hakone. These wood inlay on all Apricots are different a little each other. Finally I used the beautiful wood which is very hard to plane. Maybe Apricot has made by our highest techniques.