MuAtsu XX Comfort Semi-Double Mattress by Showa Nishikawa

[Product Name]
30-Year MuAtsu Mattress XX (Double X)
Comfort / Semi-Double (Tri-fold Type)

[Purchase Date]
July 12, 2025 (Reiwa 7)
Purchased new at the Showa Nishikawa direct store (Aeon Mall)

[Retail Price]
￥257,400 (tax included)

[Usage Period and Storage Condition]
After purchase, it was used for 1 week with a dedicated MuAtsu stretch sheet and a dedicated mattress pad. However, due to room layout constraints, I had no choice but to purchase an additional single size. I carefully stored the semi-double size, thinking I would use it someday.
(Storage condition: After use, it was thoroughly dried in a well-ventilated shade for a full day on a sunny day, then carefully stored folded in three in a dark place.)
Ultimately, I never had the opportunity to use it, and with the year-end approaching, I decided to sell it as part of decluttering.
Please note that shipping costs are high, and returns cannot be accepted. Therefore, those who are overly sensitive should refrain from purchasing.
No smoking, no pets.
The condition is excellent.

*Immediate purchase OK
*No price negotiation
*Packaged and shipped using Tansou Cost Mo Takaku, Henpin Niwa Oujiraremasenode, Shincho Na Kata Wa Goyen Kudasai. (This seems to be a placeholder or an error in the original text, as it translates to Shipping costs are high, and returns cannot be accepted, so please refrain if you are sensitive.)

[Features of 30-Year MuAtsu XX (Top-of-the-line Model)]
● High-end model designed for ultimate sleeping comfort
Uses highly resilient, highly breathable urethane throughout the entire layer, improving ease of turning over and moisture diffusion.
● Durability designed for approximately 30 years of use
Passed the 330,000 compression residual strain test.
Longer lifespan than the conventional 20-Year MuAtsu.
● 12cm thickness, 3-layer uneven structure
Top layer: Supports firmly at points to distribute body pressure
Middle layer: Maintains a natural sleeping posture
Bottom layer: Provides stable support for the entire body
● High-resilience urethane supports turning over
Achieves smooth turning over with a spring-like resilience.
● Excellent breathability
Prevents stuffiness, and moisture can be removed simply by leaning it against a wall after use.
● Thoroughly hygienic specifications
?Top layer: Ag+ antibacterial treatment (SIAA certified)
?Cover fabric: Antibacterial and odor-resistant treatment (Polygiene) + anti-mite treatment
?Cover fabric can be removed and washed

[Specifications]
● Size: 12×120×195cm (Semi-Double)
● Weight: Filling approximately 11.1kg
● Structure: 3-form
● Comfort firmness
Top layer: 200N
Middle layer: 140N
Bottom layer: 260N
*This is a firm type that supports the entire body.

[From the Seller]
The condition is excellent as it has been handled with care.
I would be happy to sell it to someone who understands its condition.