TravPriceProduct note · Japan × US47.5% cheaper in Japan
Is Fermented Penetrating Beauty Serum 50mL cheaper in Japan? the US vs Japan, a US$11.84 gap | 2026 price check
Cheaper in Japan by US$11.84 (47.5%): Japan ¥1,990 ≈ US$13.06, the US US$24.90.
01 · Verdict
47.5% cheaper in Japan- Japan list price
- ¥1,990incl. tax · official single-item list price incl. tax · In stock
- Converted US currency
- ≈ US$13.06JPY/USD 0.006564 · Bank of Taiwan board
- US list price
- US$24.90excl. tax · official list price · In stock
- cheaper in Japan
- US$11.8447.5% · US list price as denominator
US stickers exclude state and local tax; Japan stickers include tax. The bases differ, so this is not a landed cost.
Japanincl. tax、the USexcl. tax; where the tax basis differs, only the list prices are compared; a comparison of two named sources’ list prices, before card fees, shipping and tax refunds. Checked 2026-09-18. Before you order, use theJapan source page and the US source pagecurrent prices.
Japan vs US price table
| Market | List price | Source · checked | Tax basis · stock |
|---|---|---|---|
| Japanofficial single-item list price incl. tax | ¥1,990 | MUJI Japan official online store ↗ | incl. taxIn stock |
| USofficial list price | US$24.90 | MUJI USA ↗ | excl. taxIn stock |
| Japan convertedJPY/USD 0.006564 (JPY/TWD 0.2076 ÷ USD/TWD 31.625) | US$13.06 | Bank of Taiwan rate ↗ | Spot sellingNot a card or cash rate |
| Gapcheaper in Japan | US$11.84 | 47.5%US list price as denominator | Extra fees not includedCard fee, shipping and tax-free extra |
To use your own FX, fees and shipping, open the Price calculator.
Is it worth buying in Japan?
Both are single-bottle listed prices for the same 50mL essence serum: ¥1,990 incl. tax in Japan, NT$490 in Taiwan. The Japan page doesn't use a bundle price and the Taiwan page doesn't state its tax basis; shipping, tax refunds, and card fees are not included.
- With a 1.5% foreign card fee: Japan comes to about US$13.26, still below the US by US$11.64.
- Break-even rate 0.0125 USD/JPY: above it the the US sticker is the cheaper one (this check used 0.0066, cross-converted from the Bank of Taiwan yen and dollar rates).
Before you buy
- Fixed at the 50mL single bottle; do not compare against the 100mL large size or other items in the rice-bran fermentation series.
- The Taiwan barcode is a Taiwan-assigned number, different from the Japan JAN code; the ingredient wording also differs between markets — go by the official page's labeling before buying.
- Both pages showed "add to cart" available on the day of verification; price and stock follow the official page for that day.
05 · Sources
Each price keeps its source link, price kind, tax basis and check date, and is calculated with the TravPrice comparison method. If a price or model is wrong, check the source page and report it.
- Japan price
- MUJI Japan official online store ↗official single-item list price incl. tax · incl. tax · In stock · checked 2026-09-12
- US price
- MUJI USA ↗official list price · excl. tax · In stock · checked 2026-09-18
- FX
- Bank of Taiwan FX ↗Bank of Taiwan spot selling reference rate; the US dollar is cross-converted · JPY/USD 0.006564 (JPY/TWD 0.2076 ÷ USD/TWD 31.625) · 2026-09-10 23:22:00 (Taiwan time)
- Model match
- Fermented Essence Serum; 50mL; product no. 83451295; Japan JAN 4550583451295 / Taiwan barcode 4711441360559The Japan official page lists the Fermented Booster Serum, 50mL, item no. 83451295, formulated with rice bran fermented liquid, used before lotion; the Taiwan official page lists 'Rice Bran Fermented Booster Serum / 50ml,' spec 50ml, made in Japan, likewise a booster-type serum used before lotion. Volume, product stage, and manufacturing origin match on both sides, but the Taiwan page's barcode is Taiwan's own 4711441360559, different from the Japan JAN, and the ingredient copy differs between the two markets (the Japan page emphasizes naturally derived ingredients and the rice bran fermented liquid ratio, while the Taiwan page lists sodium hyaluronate and plant extracts), so this is recorded as same-spec rather than same JAN/same model. US price, checked 2026-09-18: muji.us products.json SKU/JAN 4550583451295 → 'Booster Serum 1.7 fl oz' variant 'Default Title' $24.90; available=true
- Official product page
- Brand product page ↗Product images on this site are redrawn illustrations; use the official page for appearance, extras and packaging.
- This page generated
- Generated from the same checked data; it is recalculated when the data updates.
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Sources, FX and extra-cost estimates.
04Same-category comparisonMUJI Fermented Penetrating Essence Lotion 300mL
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