Using a smartphone on a Japan train

Japan · SoftBank

How many SoftBank eSIM days do you need?

Match days to the real trip — don’t overbuy “just in case”

Updated Oct 2026

SoftBank on Klook is a daily Unlimited plan (full speed, then slower after the daily quota). Good for heavy maps / photos / chat without worrying about total GB.

Pick days without wasting money

  • Count from Japan landing to departure day — include departure day if you still need airport data
  • 6 nights / 7 days → buy 7 days, don’t add 3 “buffer” days
  • If the trip might extend, top up later — don’t always overbuy ahead

Suggested by trip

TripSuggest~Budget
Short Tokyo 3–4 daysSoftBank 3–4 days฿179–279
One city 5–7 daysSoftBank 5 or 7 days฿250–499
Multi-city 8–10 daysSoftBank 8–10 days฿399–790
Longer 2–4 weeksSoftBank 15 / 21 / 30 days฿850–1,890

Prices are approximate on the compare page — final price is on Klook for your booking date.

SoftBank or Docomo?

  • SoftBank — heavy daily use, ignore total GB
  • Docomo — prefer a fixed GB bucket (e.g. 10GB / 7 days)
Compare Docomo GB plans →

FAQ

Buy 7 days but use 5 — refund?

Usually no unused-day refund — match the real day count.

When does the day count start?

You can install before flying; usage days usually start when Japan data connects. Re-read the product page before purchase.

Still choosing eSIM vs WiFi?

Read eSIM vs Pocket WiFi →

SoftBank days chosen?

Filter SoftBank by trip length, then open Klook

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