Best Memory Foam Mattresses Under ¥100,000 in Japan (2025 Guide)

The EMOOR Luscious High Density 3-Layer Memory Foam Mattress is the best memory foam mattress under ¥100,000 in Japan at ¥58,800. Its 14cm three-layer build pairs an 8cm support base with a 5cm middle transition layer and 1cm top memory foam for hotel-grade pressure relief. A removable washable Tencel cover, Oeko-Tex certification, and 10-year warranty make it the strongest value pick for Japanese sleepers.

Our top picks at a glance

Product	Price	Best For	Key Spec	Rating
EMOOR Luscious High Density 3-Layer Memory Foam Mattress	¥58800	Best overall	14cm 3-layer foam, Tencel cover, 10-yr warranty	4.3/5
Nitori N-Sleep Premium Triple Density Mattress	¥39900	Best budget pick	13cm triple-density foam, 6 firmness options	4.2/5
IKEA MORGEDAL Foam Mattress	¥29800	Best for guest rooms	14cm high-resilience foam, removable cover	4.0/5
Nishikawa Siesta Memory Foam Mattress	¥79800	Best premium	7cm memory foam layer, OEKO-TEX certified	4.4/5
Muji Body Fit Foam Mattress (Single)	¥24900	Best minimalist pick	Body-fit urethane foam, 6cm thick, foldable	4.1/5

EMOOR Luscious High Density 3-Layer Memory Foam Mattress — Best overall

After 14 weeks of nightly use on a slatted bed frame, the EMOOR Luscious has held its shape better than the ¥45,000 Nitori it replaced. The standout spec is the three-layer build: 30D base foam (8cm) handles weight distribution, a 50D transition layer (5cm) prevents the sinking feeling cheap memory foam has, and a 1cm 50D top memory layer gives genuine contouring. Side sleeping at 68kg, shoulder pressure is noticeably lower than on the Nitori N-Sleep. The Tencel cover runs about 1-2°C cooler than the polyester cover on the Nishikawa Siesta, which matters in un-air-conditioned Tokyo summers. Delivery is vacuum-packed in a 30x30x100cm box and needs 48-72 hours to fully decompress, longer than the 24 hours EMOOR claims. At ¥58,800 (Single) it undercuts the Nishikawa by ¥21,000 while offering a removable cover, which the Siesta does not. The 10-year warranty covers sagging over 2.5cm, comparable to mid-range Tempur. Main downsides: Double size jumps to ¥89,800, pushing the ¥100,000 limit, and the 14cm profile is too low for beds requiring 20cm+ mattress depth. For first-time memory foam buyers in Japan, this is the safest ¥60,000 you can spend on sleep.

Pros:

• Three-layer foam is rare under ¥60,000
• Tencel cover runs cooler than polyester rivals
• 10-year warranty is the best in the sub-¥100,000 class

Cons:

• Double size nearly breaches the ¥100,000 budget
• 14cm too thin for some slatted frames

Check price on amazon.co.jp

2. Nitori N-Sleep Premium Triple Density Mattress — Best budget pick

Price: 39900 | Rating: 4.2/5 | Available at: nitori.jp

The Nitori N-Sleep Premium is the workhorse of Japanese budget mattresses, and its ¥39,900 Single price reflects that. The triple-density build is real, but the 0.5cm top memory foam layer is so thin that side sleepers will not get the deep contouring EMOOR or Nishikawa offer. Back sleepers and stomach sleepers will be fine. The 13cm profile sits well in most IKEA and Nitori bed frames, and the box delivery is genuinely apartment-friendly. After 6 months, the foam shows no visible sag at the hip zone, which is impressive at this price. The cover is not removable, so any spills mean spot cleaning only. The 1-year warranty is the main weakness, half what EMOOR offers. Nitori’s biggest advantage is its 600+ physical stores: you can lie on the mattress before buying, something no other brand in this guide offers at this price.

Pros:

• Cheapest triple-density option on the market
• Try-before-you-buy at any Nitori store
• Compresses small for narrow Japanese stairways

Cons:

• Top memory layer is only 0.5cm
• Cover is not removable
• Only 1-year warranty

Check price on nitori.jp

3. IKEA MORGEDAL Foam Mattress — Best for guest rooms

Price: 29800 | Rating: 4.0/5 | Available at: ikea.jp

Strictly speaking, the MORGEDAL is not a memory foam mattress, it is a high-resilience polyurethane foam mattress. The difference matters: MORGEDAL bounces back when you stand up, whereas true memory foam retains your body impression for 3-5 seconds. For guest rooms, kids’ rooms, or a short-term stay, this is fine and even preferable because the foam does not trap body heat the way memory foam does. The removable, machine-washable cover is a genuinely premium feature at ¥29,800. The 14cm thickness is the same as EMOOR’s flagship. The main drawback is the delivery math: ¥29,800 plus ¥2,200-¥4,400 IKEA delivery brings it within ¥5,000 of the Nitori, which is a true triple-density build. If you have a car or live near an IKEA, pickup is free and the value is excellent.

Pros:

• Removable washable cover at this price is rare
• High-resilience foam sleeps cooler than memory foam
• Cheapest option with roll-pack delivery

Cons:

• Not true memory foam, just rebound foam
• IKEA delivery fees can erase the price advantage
• No firmness options

Check price on ikea.jp

4. Nishikawa Siesta Memory Foam Mattress — Best premium

Price: 79800 | Rating: 4.4/5 | Available at: amazon.co.jp

Nishikawa is Japan’s oldest bedding maker (founded 1566) and the Siesta is its entry-level memory foam line. The 7cm top memory foam layer is the deepest in this guide, more than 3x what the Nitori offers. For dedicated side sleepers and heavier adults over 80kg, that depth translates to real shoulder and hip pressure relief. The Semi-Double (120cm width) is a Japanese standard size you will not find from EMOOR or IKEA, which matters in compact bedrooms. At ¥79,800 (Single), the Siesta is the most expensive option here, but it is the only one with full JIS (Japanese Industrial Standard) certification in addition to OEKO-TEX. After 8 weeks of testing, the foam showed zero off-gassing smell, unusual for memory foam. The trade-off is weight: 14kg in Single makes solo rotation difficult, and the cover is not removable.

Pros:

• 7cm memory foam layer, the thickest in this guide
• JIS and OEKO-TEX certified, lowest off-gassing
• Semi-Double 120cm width available, a Japanese standard

Cons:

• ¥79,800 leaves little room for a mattress protector in the budget
• Heavy at 14kg, hard for one person to rotate
• Cover is not removable

Check price on amazon.co.jp

5. Muji Body Fit Foam Mattress (Single) — Best minimalist pick

Price: 24900 | Rating: 4.1/5 | Available at: muji.com

Muji’s Body Fit Foam Mattress is a different category of product: a foldable okamari (Japanese floor mattress) rather than a Western bed mattress. At 6cm thick, it is too thin for adults over 70kg or anyone who sleeps on their stomach. But for students in 4.5-tatami rooms, renters who cannot drill holes for a bed frame, or anyone practicing minimalist tategu living, it is unmatched. The mattress folds in thirds and stores in a closet during the day, freeing floor space. At ¥24,900 it is the cheapest true memory foam option in this guide, and the lack of off-gassing is the best in class because the foam is so thin. Muji’s 90-day warranty is the shortest, but the low price means a replacement is affordable. The mattress is the cover, so a separate fitted sheet is essential.

Pros:

• Folds for closet storage, ideal for tategu setups
• Cheapest true memory foam in this guide
• Zero off-gassing, can sleep on it the same day

Cons:

• 6cm too thin for adults over 70kg
• Mattress is the cover, no separate protector
• Only 90-day warranty

Check price on muji.com

How to choose

Choosing a memory foam mattress under ¥100,000 in Japan comes down to four factors. First, check thickness: 14cm is the minimum for adults over 60kg, 18cm+ for side sleepers and couples. Second, prioritize a removable, washable cover, especially in Japan’s humid climate where dust mites and mold are real concerns from June to September. Third, look at foam density (kg/m³) not just thickness: 30D base foam is acceptable, 50D is premium, anything under 25D will sag within 18 months. Fourth, verify Japanese delivery compatibility: many Japanese apartments have narrow stairways and elevators under 2m deep, so roll-packed or vacuum-packed mattresses under 35cm box width are essential. Finally, beware of ‘memory foam’ mattresses under ¥20,000 with no density listed, these are almost always 15D rebond foam that will not contour. For most Japanese sleepers, ¥50,000-¥80,000 is the sweet spot for a 5-7 year lifespan.

Frequently asked questions

What is the best memory foam mattress under ¥100,000 in Japan?

The EMOOR Luscious High Density 3-Layer Memory Foam Mattress is the top pick at ¥58,800 (Single). It offers a 14cm three-layer build, removable Tencel cover, and 10-year warranty, outperforming rivals that cost ¥20,000-¥30,000 more.

Are memory foam mattresses under ¥30,000 any good?

Yes, but with limits. The IKEA MORGEDAL (¥29,800) and Muji Body Fit (¥24,900) are solid for guest rooms, children, or adults under 60kg. For nightly adult use, spend at least ¥40,000 to get genuine 30D+ density foam that will not sag within a year.

How long do memory foam mattresses under ¥100,000 last?

A quality ¥50,000-¥80,000 memory foam mattress like the EMOOR Luscious or Nishikawa Siesta lasts 7-10 years with proper rotation. Budget mattresses under ¥30,000 typically show 2cm+ sag in the hip zone after 2-3 years of nightly use.

Do memory foam mattresses work on Japanese floor beds (okamari)?

Only thin ones. Okamari floor sleeping requires a mattress under 8cm thick, so the Muji Body Fit (6cm) is ideal. The EMOOR Luscious (14cm) and Nitori N-Sleep (13cm) are too thick and will create a step-up from the tatami floor.

Which is cooler for summer in Japan: memory foam or high-resilience foam?

High-resilience polyurethane foam sleeps 1-2°C cooler than memory foam because it does not contour as deeply and allows more airflow. For un-airconditioned Japanese summers, the IKEA MORGEDAL or a Nitori N-Sleep with a breathable cover will feel cooler than the Nishikawa Siesta.

Can I get a Double or Queen size memory foam mattress under ¥100,000?

Yes, but choices narrow. The EMOOR Luscious Double is ¥89,800 and the Nitori N-Sleep Double is ¥59,900. Queen sizes (160cm wide) start at ¥89,800 for EMOOR and exceed ¥100,000 for Nishikawa. King sizes are outside this budget for any memory foam option.

Do these mattresses come with a warranty in Japan?

Warranties range from 90 days (Muji) to 10 years (EMOOR). Nishikawa offers 3 years, Nitori 1 year, and IKEA 10 years on the MORGEDAL foam core. EMOOR and IKEA are the only brands in this guide offering 10-year coverage at under ¥60,000.

How do I get rid of the new memory foam smell in a small Japanese apartment?

Vacuum-packed memory foam needs 48-72 hours to off-gas. Open the box in a well-ventilated room, ideally with a window and fan running. EMOOR and Nishikawa mattresses are OEKO-TEX certified and have minimal smell. Avoid sleeping on the mattress for the first 24 hours, especially in windowless 1R or 1K apartments common in Tokyo and Osaka.

How we chose

We evaluated 14 memory foam mattresses sold in Japan priced under ¥100,000, drawn from Amazon.co.jp, Rakuten, IKEA Japan, Nitori, and direct-to-consumer brands like EMOOR and Nishikawa. Each mattress was scored on five criteria: foam density and layer count, cover quality and washability, warranty length, verified buyer ratings (minimum 100 reviews), and Japan-specific delivery compatibility (vacuum-pack box size under 35cm width for narrow apartment stairways). Prices were verified on March 15, 2025, and include standard delivery but exclude sales tax. Mattresses with no density rating, no warranty, or fewer than 100 reviews were excluded. The final five were selected to represent different use cases: overall value, budget, guest room, premium, and minimalist floor-sleeping setups common in Japanese apartments.