Naoki Urasawa
Written and illustrated by Naoki Urasawa, while he was simultaneously illustrating "Pineapple Army", "Yawara!" was serialized weekly in "Big Comic Spirits" from the 30th issue of 1986 to the 38th issue of 1993. Publisher Shogakukan collected the chapters into 29 "tankōbon" volumes between April 30, 1987 and October 29, 1993. A 19 volume "bunkoban" edition was released between July 17, 1998 and March 16, 1999. A twenty-volume "kanzenban" edition was released between December 27, 2013 and April 30, 2015.