I'll take you on a full tour of one of my favorite stores in all of Japan, Trial. Trial has EVERYTHING, and for cheap. This location is near Shimosone Station in Kitakyushu.
I mention in the video this chain is Kyushu only and I found out it's ALL OVER JAPAN, lol. I have been all over Japan, yet I have only spent extensive time in Tokyo, Kitakyushu and Fukuoka Prefecture. They don't have any stores in Tokyo according to the website so that sort of explains why I've never seen one outside of Kyushu.