Seat: Surface fabric/natural rush or resin pipe Inside: 5mm polyethylene foam, MDF (medium density fiberboard)
Body: Synthetic resin-coated particle board (melamine)
Base plate: MDF (medium density fiberboard)

Load capacity: Approx. 120kg
Assembly time: about 15 minutes

■Main unit

• Scratch and water resistant melamine laminate
• Large capacity storage
• We also recommend using it in combination with a tatami bed.
• Can also be used as a storage box or stool
• Allergen adsorption sheet included
• Accessories include connecting hardware and cushioning seals
  

■ Seat *The seat is made of expanded polyethylene (EPE), so it is less likely to become worn out!

[Made from natural rush grass]

• Anti-mold processed (made in Japan)
• Antibacterial and deodorizing function
  

[Made of deodorizing resin]

• Antibacterial and deodorizing function*
• Easy to maintain *Effective due to the inclusion of baked scallop shell powder

■ About shipping
Orders placed before 12pm on weekdays will be shipped the same day

■Shipping Fees
Free shipping for orders over 3,980 yen *Excluding Okinawa, remote islands and some areas

Click here for delivery details

■Regarding returns: In principle, we do not accept returns for reasons of customer convenience.

Return policy here

■ Upon delivery

• There may be a lingering odor from paint or adhesives used during manufacturing.
• People who are sensitive to chemicals may rarely experience allergic reactions, so please be sure to ventilate the room thoroughly immediately after opening the product.

■ When installing the product

• Please make sure to place the product on a level, flat surface. When assembling the product, be careful not to pinch your hands, fingers, or feet.
• First, tighten the screws loosely (temporarily), then tighten them again firmly after you have adjusted the overall shape.
• Do not use in places exposed to direct sunlight or heat or air from heating/cooling equipment as this may cause deformation or discoloration.
• If the floor is made of a material that is easily scratched, protect the floor by placing a carpet or similar item on top.
• Do not drag the product when installing or moving it, as this may damage the product or the floor surface.
• If the product is attached to a wall, it may be scratched or discolored. Be sure to leave a gap when installing the product.

■ Handling Precautions

• Please keep the packaging bag out of reach of infants and children. Putting it over the head may pose a suffocation hazard.
• Do not allow small children or people who are unable to judge danger to use this product. Unexpected behavior may result in injury.
• If the product is damaged, deteriorated, or deformed, discontinue use.
• Do not use heating appliances near the product as this may cause deformation, damage or fire.
• Stagnant air in a hot and humid room can lead to the growth of dust mites and mold, which can be harmful to your health. Be sure to ventilate the room sufficiently.
• Do not place or store extremely heavy objects on the product as this may cause damage.
• Be careful not to overtighten the bolts and screws. Tightening with more force than necessary may cause damage.
• Bolts and screws may loosen during use. Please retighten them about once every three months.
• If you find any pests, immediately treat them with insecticide or insect control. If left untreated, the pests may multiply.
• To remove dirt, wipe gently with a dry cloth. To remove heavy dirt, apply diluted neutral detergent to a cloth, wring it out thoroughly, wipe the surface, and then dry thoroughly.

■Before starting assembly

• Please check that all parts and components are included.
• Please be sure to read the assembly precautions before beginning assembly.
• Do not tighten the screws or bolts too much in one go. First tighten them temporarily, then check for any gaps or distortion before tightening them further.
• To protect your hands and fingers, we recommend wearing gloves or work gloves during assembly.

下記よりダウンロードをお願い致します。
https://ooshima-ya.com/OSMY/wp-content/uploads/2025/06/tatami_box-manual.pdf

We will only exchange the product for a new one if it is defective upon receipt . Please note that the following points are due to the characteristics of rush products and do not mean the product is defective.

Characteristics of rush products

• Due to the characteristics of natural materials, some of the rush may be cut and sticking out.
• Due to individual differences in rush leaves, partial discoloration or uneven coloring may be observed.
• The color may be white or discolored near the edges and seams, but this is due to the natural properties of the rush grass.
• The natural scent may be strong at times but will fade over time.

■ Examples of initial defects

• If the lining is frayed
• If the edges are not sewn properly (not stitched)
• If there are any large holes or tears
• If there is significant dirt or stains