eSIM square Coupon: 10% OFF for First-Time Users — Best eSIM for Japan Travel

About eSIM square

[First-Time Users Only] 10% OFF — Your Japan Trip Starts Here

This coupon is available for first-time eSIM square users only.

eSIM square positions this as a trial offer — which means the discount is genuinely generous. If you’ve never tried eSIM square before, this is the best price you’ll ever get.

WiFiBOX or eSIM? Here’s How to Choose

Both eSIM square and WiFiBOX are great options for staying connected in Japan. Here’s a quick guide to help you decide:

Choose eSIM if:
– You’re traveling solo and want the lightest possible setup
– You don’t want to carry an extra device
– You’re comfortable setting up eSIM on your phone before departure

Choose WiFiBOX if:
– You’re traveling with family or friends and want to share one connection
– Your phone doesn’t support eSIM
– You want a built-in mobile battery to charge your devices on the go
– You prefer unlimited data without worrying about plan limits

Both options offer 10% off with JTC coupons.

→ Check our WiFiBOX coupon here:

WiFiBOX Coupon 10% OFF, Get Pocket Wifi & Mobile Battery

Check This Coupon

Why eSIM square Works for Japan Travel

1. No SIM Card, No Hassle

There’s no physical card to pick up, no vending machine to find at the airport, and nothing to lose or break. You purchase the plan online before you leave, scan a QR code to install it on your phone, and set eSIM square as your data line. The moment your flight lands in Japan, your phone switches over automatically. It just works.

2. Pricing That Makes Sense

A Japan plan with enough data for a typical trip costs well under ¥2,000 with this coupon. Compare that to international roaming charges from your home carrier, or the time spent hunting for a SIM card at the airport, and the value is obvious.

3. Top-Up Without Starting Over

If you run low on data mid-trip, you don’t need to buy a new plan from scratch. Log into your eSIM square account and add more with one tap — no reinstallation, no QR code scanning again.

Editor’s Note

I used the Japan 5GB 15-day plan on my last trip. Before this, I was relying on my Indonesian carrier’s international roaming plan, which was fine but noticeably slower. eSIM square was faster and had no lag issues throughout the trip. The part I appreciated most was the automatic switchover: I set everything up before boarding, and by the time I cleared immigration in Japan, my phone was already connected. I’ll be honest — I wasn’t sure it would actually work until it did. It did. — Editor KT

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