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Kyota Genki M380 vs MassaMax MT339 4D
Which one has the downsides you can live with?
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The short answer
Kyota Genki M380 ranks higher (#2 vs #3 of 8) and scores better on massage quality, fit for body sizes, reliability & warranty. MassaMax MT339 4D wins on programs & controls.
The biggest complaint about the Kyota Genki M380 is heat is hit or miss; for the MassaMax MT339 4D it's cramped for taller users. Pick the one whose catch bothers you less.
Side by side
| Kyota Genki M380 | MassaMax MT339 4D | |
|---|---|---|
| Rank in massage chairs | #2 | #3 |
| Price tier | $$$ | $ |
| Type | Full-body 2D/3D | Premium 4D |
| Amazon 1–2★ share | — | 10% |
| Overall score | 3.9 | 3.3 |
| Massage quality | 4.5 | 4.0 |
| Fit for body sizes | 4.5 | 2.5 |
| Programs & controls | 3.5 | 4.0 |
| Delivery & size | 3.0 | 3.0 |
| Reliability & warranty | 4.0 | 3.0 |
Price tiers: $ under $2,000 · $$ $2,000–5,000 · $$$ over $5,000 (list price — street prices are often much lower). Highlighted = clearly better (a score gap of 0.3 or more, or a 1–2★ share at least 3 points lower). Scores are explained, with sources, on each product's page.
Top complaints
Kyota Genki M380
- Heat is hit or miss
Wirecutter's testers were mixed: some found the warming just right, others too hot or hard to adjust.
Source: Wirecutter - Remote-only controls
There's no touchscreen. Because it uses a handheld remote, you may have to pull your arms out of the arm massagers to change programs or settings (Wirecutter).
Source: Wirecutter - Few frills for the list price
Wirecutter says it usually retails for $7,000 (often on sale for $4,000) yet lacks some bells and whistles. Its buying links showed $2,799 at Amazon and $6,715 at Home Depot.
Source: Wirecutter
MassaMax MT339 4D
- Cramped for taller users
Although rated for 6'1" and 300 lb, a 5'10" Wirecutter tester felt the torso wasn't high enough, and the body scan set a 5'9" tester's shoulders 'at a weird position,' so programs missed their targets.
Source: Wirecutter - Weak heat
Most Wirecutter testers found the heat unsatisfactory, and three said it 'should have been warmer.' Amazon's summary says some owners find the heat isn't noticeable.
- Overly intense or faulty for some
Amazon's summary says some owners find it very intense on the lower back and functionality gets mixed reviews. A 1-star reviewer says that after about two and a half months it made an odd sound and some rollers hit painfully hard, with no support.
Who should pick which
Pick the Kyota Genki M380 if
Taller and heavier users (up to 6'2" and 300 lb)
A deep but well-targeted massage
A chair that doesn't look gaudy
Skip it if: You want a touchscreen or armrest controls; You're sensitive to strong heat; You won't wait for a sale (often listed far above its street price)
Pick the MassaMax MT339 4D if
Strong lower-back and foot massage
4D rollers on a budget
Hands-free voice control
Skip it if: You're around 5'9" or taller; Warm heat matters to you; You want simple controls
We don't list prices — they change daily. Paid links.