Best eSIM for Japan 2026: every seller's price, side by side
List prices in USD for the same data and validity, from 1 sellers our price radar reads (the 1 with the widest coverage are shown). No discount codes, no "from" prices: the plan you would actually buy. Slashtel's best value for Japan today is 20GB for 30 days at $18.29 ($0.91 per GB).
| Plan | Slashtel | Airalo | Cheapest |
|---|---|---|---|
| 3GB · 30 days | $4.69 | $8.50 | Slashtel |
| 5GB · 30 days | $6.59 | $11.50 | Slashtel |
| 10GB · 30 days | $10.89 | $18.00 | Slashtel |
| 20GB · 30 days | $18.29 | $26.00 | Slashtel |
"–" means that seller has no plan of at least that size and validity. Competitor prices are read from their public sites and may lag a day; a seller's name is its trade mark.
See all Slashtel Japan plans →
Questions
Which eSIM is cheapest for Japan?
On 28 September 2026, across 4 plan sizes we track, Slashtel was the cheapest on 4; the table shows every seller's price per size so you can check your own usage. Prices are list prices in USD without discount codes.
How much data do I need for Japan?
Maps, messaging and browsing use about 0.3GB a day; video calls and streaming about 1GB a day. A week needs 3GB for most people; two weeks 5GB; a month 10GB.
Are these prices live?
Competitor prices are read from their public sites by our price radar and refreshed daily; Slashtel prices are our live catalogue. Last check: 28 September 2026.
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