Amazon.co.jp: Joint Mat Iro-Iro Fit, 8mm Thick, 12 Pieces (1.5 tatami mats), Rug/Mat Color: Sunny Side Lemon: DIY & Tools & Garden https://share.google/aGX6pe40ivGVPQ63e I mistakenly purchased this item, and it is unopened. It arrived 5 days ago. When I tried to return it, I received a reply stating, "You will need to transfer money for the handling fee," so I have decided to list it here. I am currently using the 10mm thick version, which is 2mm thicker. I ordered this as a spare to prevent warping when using a hot carpet, but I made a mistake in my order because I was in a hurry to prepare for cold weather. This is the same product that is ranked No. 1 in joint mats on Rakuten. I have been using it for 2 years in a kids' room, and I am very satisfied with it. It would be useful for preparing a kids' space during maternity leave, filling in small level differences, making handmade toys, covering areas where pets tend to have accidents, and creating a space for baby-led weaning. I purchased it for 3333 yen including shipping. I will cover the shipping cost of 1050 yen.