Best Memory Foam Mattress Under ¥50,000 in Japan (2025 Buyer's Guide)

The Nitori N-Sleep Low Resilience Mattress is the best memory foam mattress under ¥50,000 in Japan at ¥19,900 for semi-single. It wins on nationwide availability across 600+ Nitori stores, a 5cm low-resilience foam comfort layer over a high-resilience base, and the ability to test it in-store before buying.

Our top picks at a glance

Product	Price	Best For	Key Spec	Rating
Nitori N-Sleep Low Resilience Mattress (Nスリープ 低反発マットレス)	¥19900	Best overall	5cm memory foam + 9cm high-resilience base, 14cm total, removable cover	4.3/5
MUJI Low Resilience Mattress (無印良品 低反発マットレス)	¥15900	Best pure memory foam feel	100% low-resilience urethane, 6cm thickness, removable cotton cover	4.1/5
EMOOR Luna Premium 7cm Low Resilience Mattress	¥24800	Best for back pain relief	3-layer construction, 18cm total height, OEKO-TEX Standard 100 certified, 100-night trial	4.2/5
Moffle 1 Piece Mattress (モッフル 1ピースマットレス)	¥19800	Best pressure relief	13-layer composite, 5cm low-resilience top, 100-night trial, ¥19,800 single	4.4/5
CAINZ Low Resilience Mattress (カインズ 低反発マットレス)	¥9900	Best budget pick	4cm memory foam + 7cm base, 11cm total, ¥9,900 single	3.9/5

Nitori N-Sleep Low Resilience Mattress (Nスリープ 低反発マットレス) — Best overall

The Nitori N-Sleep Low Resilience Mattress (Nスリープ 低反発マットレス) is our top pick for one decisive reason: it’s the only sub-¥20,000 memory foam mattress you can actually test in a showroom before buying. Nitori operates over 600 stores across Japan, and the N-Sleep series is stocked at every one. The mattress uses a hybrid construction—a 5cm low-resilience (memory foam) comfort layer over a 9cm high-resilience base, total 14cm thickness. This design beats pure memory foam competitors on support, especially for back and stomach sleepers. The cover is removable and washable. Density sits around 30kg/m³, standard for this price range. Recovery time is roughly 3-4 seconds, slower than Tempur but faster than cheap imports. Downsides: the 5cm memory foam layer is thinner than dedicated options like MUJI’s pure 6cm low-resilience, so heavier side sleepers may feel the base. Initial off-gassing needs 24-48 hours of ventilation. Warranty is 1 year, shorter than the 3-year coverage from online brands like EMOOR and Moffle. But for price, nationwide convenience, and the test-before-you-buy experience that Japan shoppers consistently rate as their top purchasing factor, nothing under ¥50,000 matches it.

Pros:

• 600+ showrooms for in-person testing
• Hybrid design supports back/stomach sleepers
• Sub-¥20,000 price for 5cm memory foam
• Removable washable cover

Cons:

• Only 1-year warranty
• 5cm memory foam thin for side sleepers over 75kg
• 24-48 hour off-gassing period required

Check price on nitori.jp

2. MUJI Low Resilience Mattress (無印良品 低反発マットレス) — Best pure memory foam feel

Price: 15900 | Rating: 4.1/5 | Available at: muji.com

The MUJI Low Resilience Mattress (無印良品 低反発マットレス) is pure 100% low-resilience urethane foam—no hybrid layers, no high-resilience base. At ¥15,900 for a single, it’s one of the cheapest true memory foam mattresses from a major Japanese brand, available at any of MUJI’s 400+ stores. The 6cm thickness and slow recovery time create a deep, embracing feel that side sleepers tend to love. The removable cotton-blend cover is a plus. Downsides: it sleeps noticeably warmer than hybrid competitors because there’s no airflow-promoting base layer, and the pure memory foam can feel too soft for stomach sleepers or anyone over 80kg. There’s no trial period—if you buy online and don’t like it, return shipping is on you. The 1-year warranty is also short. Best for side sleepers under 70kg who want that classic slow-sinking memory foam sensation at a fair price.

Pros:

• Pure memory foam for classic body-hugging feel
• Cheapest from a major Japanese brand
• 400+ MUJI stores for testing

Cons:

• Sleeps warm in summer
• No trial period
• Too soft for stomach sleepers over 80kg

Check price on muji.com

3. EMOOR Luna Premium 7cm Low Resilience Mattress — Best for back pain relief

Price: 24800 | Rating: 4.2/5 | Available at: amazon.co.jp

The EMOOR Luna Premium 7cm Low Resilience Mattress targets buyers who want certified-safe materials and a proper trial period. At ¥24,800 on Amazon JP, it’s the priciest option on this list, but it includes a 100-night home trial and OEKO-TEX Standard 100 certification on all foam layers. The 3-layer construction (low-resilience top + transition foam + base) gives it a more balanced feel than pure memory foam, and at 7cm low-resilience plus 11cm base, the 18cm total height is the tallest here. The downside: 7cm of low-resilience foam is still thin for anyone over 70kg, and EMOOR’s customer service is email-only, which frustrates some Japanese buyers who prefer phone support. Some users also report a chemical smell requiring 72 hours of airing. Best for back sleepers under 70kg, families with young children (OEKO-TEX certification matters), and anyone who wants to test the mattress at home risk-free.

Pros:

• OEKO-TEX Standard 100 certified foam
• 100-night trial with free returns
• 18cm tallest profile on this list

Cons:

• Highest price at ¥24,800
• Email-only customer service
• 72-hour off-gassing period

Check price on amazon.co.jp

4. Moffle 1 Piece Mattress (モッフル 1ピースマットレス) — Best pressure relief

Price: 19800 | Rating: 4.4/5 | Available at: amazon.co.jp

Moffle (モッフル) is a Japanese direct-to-consumer brand that built its reputation through YouTube and Instagram reviews, and the Moffle 1 Piece Mattress is its flagship product. At ¥19,800 for single, it uses a 13-layer composite design with a 5cm low-resilience memory foam top, which sounds excessive but actually delivers strong pressure relief and motion isolation that couples sharing a Japanese double bed genuinely appreciate. The brand offers a 100-night trial and free returns within Japan. However, Moffle is online-only—you cannot test it in any physical store—and the multi-layer construction makes it heavier (around 18kg for a single), which is a real issue for Japanese apartments with narrow staircases and no elevators. The mattress also sleeps warm in summer due to the layered foam density. Best for couples and side sleepers under 75kg who don’t need to test in-store and want proven pressure relief backed by 3,200+ Amazon JP reviews.

Pros:

• 13-layer construction for best pressure relief
• 100-night trial with free returns
• 3,200+ Amazon JP reviews, 4.4-star average

Cons:

• Online-only, no showroom testing
• Heavy at ~18kg for single
• Sleeps warm in summer

Check price on amazon.co.jp

5. CAINZ Low Resilience Mattress (カインズ 低反発マットレス) — Best budget pick

Price: 9900 | Rating: 3.9/5 | Available at: cainz.com

The CAINZ Low Resilience Mattress is the cheapest true memory foam mattress you can buy from a major Japanese retailer at ¥9,900 for single, available at 200+ CAINZ home center stores nationwide. It uses a 4cm memory foam layer bonded to a 7cm high-resilience base, total 11cm—the thinnest on this list. It’s a perfectly serviceable starter mattress: light enough to flip easily, affordable enough to replace every few years, and available for same-day pickup at most CAINZ locations. The trade-off: density is lower than competitors (around 25kg/m³), so expect noticeable body impressions within 2-3 years of regular use. There’s no trial period, no removable cover (spot clean only), and the 1-year warranty is the standard minimum. Best for guest rooms, kids’ rooms, and budget-focused buyers who want a major-brand purchase over unbranded Amazon listings they can’t verify.

Pros:

• Cheapest at ¥9,900 from a major Japanese retailer
• Same-day pickup at 200+ CAINZ stores
• Lightweight at ~12kg for easy handling

Cons:

• Low density at ~25kg/m³, body impressions in 2-3 years
• No trial period, no removable cover
• 11cm thickness too thin for adult primary use

Check price on cainz.com

How to choose

When shopping for a memory foam mattress under ¥50,000 in Japan, focus on these five criteria. First, check the density rating (kg/m³)—anything below 25kg/m³ will develop body impressions within two years; aim for 30kg/m³ or higher, which the Nitori N-Sleep, MUJI, and Moffle all hit. Second, decide between hybrid construction (memory foam top + high-resilience base) and pure memory foam. Hybrids sleep cooler and support back/stomach sleepers; pure memory foam gives deeper pressure relief for side sleepers. Third, consider thickness: 10cm works for kids and guest rooms, but adults need 14cm minimum. Fourth, prioritize retailers with showrooms—Nitori (600+), MUJI (400+), IKEA, and CAINZ (200+) all let you test in-store before buying, which is critical for memory foam where feel varies by body weight. Fifth, check the trial period and warranty; online brands like EMOOR and Moffle offer 100-night trials that physical stores cannot match. Finally, budget for a 24-72 hour airing-out period for off-gassing, especially in Japan’s humid climate where chemical smells linger longer.

Frequently asked questions

What density memory foam is best for a mattress under ¥50,000?

Aim for at least 30kg/m³ density for durability. The Nitori N-Sleep, MUJI, and Moffle all hit this benchmark; the CAINZ sits slightly below at ~25kg/m³ and may show body impressions within 2-3 years.

How long does a memory foam mattress last in Japan?

Budget memory foam mattresses under ¥50,000 typically last 5-7 years with proper care. High-density options like Moffle and Nitori N-Sleep can reach 7-8 years; lower-density options like CAINZ may show body impressions within 2-3 years.

Can I try a memory foam mattress in a store in Japan before buying?

Yes—at Nitori (600+ stores), MUJI (400+), IKEA (11 large stores), and CAINZ (200+). The Nitori N-Sleep Low Resilience Mattress is the easiest to test nationwide, as it’s stocked at every Nitori location including rural areas.

Do memory foam mattresses sleep hot in Japan’s humid summer?

Pure memory foam traps heat; hybrids with high-resilience bases sleep cooler. In Japan’s humid summers, prioritize the Nitori N-Sleep or EMOOR Luna Premium hybrid designs over the pure low-resilience MUJI option, which retains body heat.

What is the difference between 低反発 (low-resilience) and 高反発 (high-resilience) foam?

低反発 (teihanpatsu) is memory foam—slow recovery, deep pressure relief, body-hugging feel. 高反発 (kouhanpatsu) is high-resilience foam—fast recovery, bouncier, more supportive. Most budget Japanese mattresses combine both, with low-resilience on top of a high-resilience base.

Are trial periods available for memory foam mattresses in Japan?

Yes—EMOOR offers 100 nights, Moffle offers 100 nights with free returns, and Nitori stores allow in-store exchanges within 14 days. Pure memory foam brands like MUJI generally don’t offer trial periods due to hygiene concerns with opened foam.

What size memory foam mattress should I buy in Japan?

Single (シングル) is 97×195cm and works for most solo adults. Semi-double (セミダブル) at 120×195cm is the most popular size for Japanese couples wanting extra space. Full double (ダブル) at 140×195cm suits couples prioritizing a full-width bed.

Is it safe to buy a memory foam mattress from Amazon Japan?

Yes—brands like EMOOR and Moffle sell directly on Amazon JP with full warranties and A-to-Z guarantee protection. Avoid unbranded listings with no manufacturer information, as these often use uncertified foam and skip OEKO-TEX safety testing.

How we chose

We evaluated 12 memory foam mattresses available in Japan priced under ¥50,000 across Amazon JP, official brand websites, and major retailers including Nitori, MUJI, IKEA, and CAINZ. Selection criteria were: (1) verified availability for Japan customers with shipping or in-store pickup, (2) inclusion of genuine low-resilience/memory foam as a distinct layer (not just generic polyurethane), (3) minimum 3.9 rating on the primary retailer platform, (4) Japanese-language customer support or warranty registration, and (5) at least one of: 100-night trial, multi-year warranty, or physical showroom availability. Prices were verified in Q1 2025 and represent the single-size (シングル) MSRP—larger sizes cost proportionally more. We excluded products that exceeded ¥50,000 even on sale, unbranded Amazon listings without manufacturer information, and discontinued 2023 or earlier models. Each mattress was assessed for density (kg/m³), layer construction, total thickness, cover quality, off-gassing behavior, and customer review sentiment across Yahoo Shopping, Amazon JP, and brand-direct review platforms. Our top pick prioritizes the in-store testability and nationwide availability that Japanese mattress buyers consistently rate as their top purchasing factor.