Is It Worth Buying in Japan When You'd Only Save a Few Dollars? 4 Items Show the Fee and Buffer Math

Start by subtracting the NT-dollar converted value of the Japan yen price from the Taiwan list price to get the "price gap buffer." This isn't a suggestion to spend the whole gap — it's telling you that once extra costs exceed this number, buying in Japan is no longer cheaper in this scenario.

Pick your baseline before doing the math: this article always uses the original list price and never mixes in a tax-free discount. If tax-free eligibility is confirmed, recalculate using the actual amount the store can process, rather than multiplying every item by 90%.

WH-1000XM6: Japan list price ¥59,400, converts to about NT$12,331; Taiwan page lists NT$12,400, Japan's list price is about NT$69 lower.

Based on Japan's converted price of NT$12,331, a sample 1.5% fee comes to about NT$185; adding it brings the total to about NT$12,516, which ends up about NT$116 higher than Taiwan's NT$12,400.

Looking only at the payment fee with everything else held constant, the fee rate it can absorb is about 0.56%. This is a mathematical break-even point, not a quote from any actual credit card, and it doesn't include refunds, warranty, or transportation costs.

Aqua Rich Watery Essence Sunscreen 70g: Japan list price ¥968, converts to about NT$201; Taiwan page lists NT$249, Japan's list price is about NT$48 lower.

CEZANNE Tone Filter Highlight 01 Filter Beige: Japan list price ¥693, converts to about NT$144; Taiwan page lists NT$388, Japan's list price is about NT$244 lower.

Under a 1.5% fee scenario, the sunscreen's remaining price gap is about NT$45; for the brightening pressed powder, it's about NT$242. The same fee percentage eats up a different amount depending on the item.

If you're already at the store, these gaps can serve as a buying reference; if you'd need to take a separate ride, call a car, or pay for shipping, that added cost should be counted as part of this purchase. The cost of a flight you were taking anyway doesn't need to be forced into a per-item cost.

Men's DRY-EX Polo Shirt (Short Sleeve): Japan list price ¥2,990, converts to about NT$621; Taiwan page lists NT$590, Taiwan's list price is about NT$31 lower.

For DRY-EX, the original list price is lower in Taiwan; if you want to recalculate using Japan's tax-free terms, that's a separate scenario you'd need to build out in full. You can't use Japan's possible tax-free price on one hand while ignoring the promotion Taiwan already has confirmed and available on the other.

Record the actual yen amount paid in Japan, your exchange or settlement rate, any extra payment fees charged, and any added shipping or other costs from this purchase. Only by comparing the converted total against the achievable Taiwan price for the same spec can you answer "where to buy this time."

If the exchange rate you're using already includes a certain fee, don't add it again. This piece doesn't forecast the yen's direction, and it doesn't assume any particular card will earn rewards; don't subtract a reward you're not sure you'll actually receive.