Matsushita Electric Works Oki-Dako (Tatami Mats) - Gray These are Oki-Dako (stackable tatami mats) from Tatami-ga-oka, which create a Japanese-style space in a corner of your room. They were used as a Japanese space by placing only the Oki-Dako on the flooring. They were used without being fixed to the floor, but those who are concerned (not suitable for children or the elderly from a safety perspective) should refrain from purchasing. Living Room Dining Room Oki-Dako (Tatami Mats) - Gray Manufacturer Model Number: MHJB4K1E Body Width: 848mm Body Length: 848mm Body Height: 15mm Quantity: 4 mats Material: Polypropylene Weight per mat: Approximately 4 kg Weight of 4 mats: Approximately 16 kg There are stains, scratches, and deterioration due to use. Please understand this before purchasing. *Photos 3 and 4 are MHJB4K1E Photos 1 and 2 are MHJB4K◯E The shades of gray are slightly different. Although they are not the same, there are similar light gray Oki-Dako (a total of 8 mats), so please take a look if you'd like. They were arranged in a checkered pattern with 8 mats.