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About the scoresThe scores are calculated mechanically by applying the criteria table at the end of the page to figures published on the manufacturers' official pages and manuals (and on retail or comparison pages where an official figure was not available). We call it the "Spec Score".
Spec Score #4Memory-foam pillow (4-step height adjustment)
Best for finding your height first, without spending much
2.55★★★☆☆Spec Score (out of 5)
See on Amazon¥4,898See on Rakuten¥4,998Price as of 2026-09-25 · affiliate link · Opens the shop's site
Score Breakdown
Specs
| Size | W53 × D32 × H4–11 cm |
|---|---|
| Weight | About 1.2 kg |
| How height adjusts | Four-step height adjustment |
| Core | Newly developed memory-foam material |
| Cover | Premium knit (30% rayon, 70% polyester). Breathable and easy to care for in a washing machine |
| Extras | Bamboo-charcoal deodorizing, anti-slip pillow stopper |
| Warranty | 1-year quality warranty from purchase (maker-direct) |
| Made in | A dedicated factory in China (planned and developed in Japan) |
| Model no. | ptm-02 (white) |
🙂 Good points
- Four settings from 4 to 11 cm in height — the widest range the makers give in figures among the four
- At the time of listing (2026-09-25), the lowest Amazon and Rakuten prices of the four (Amazon ¥4,898)
- Cover is machine-washable, and the maker cites bamboo-charcoal deodorizing
🙁 Things to note
- The maker presents the cover (machine care) as the washable part
- Height is chosen from four fixed settings
Sources
GOKUMIN official store product page
Scores are calculated only from specs published on official and retail pages.