There are several Japanese series here is one, Bijutsu Shuppan-Sha Basic Pose #1152 ISBN#4-568-30049-5 Daily pose #1007 ISBN#4-568-30047-9 Moving Pose #1223 ISBN#4-568-30048-7 Couples Pose-1 #891 ISBN#4-568-30051-7 Couples Pose-2 #437 ISBN#4-568-30052-5 These books contain nude figures as well as clothed ones (similar to the "Illustrator Figure Ref, Manual's"), therefore are not for children under age.