Telecom Square Co., Ltd. (Headquarters: Chiyoda-ku, Tokyo; President: Yuji Yoshitake; hereinafter referred to as "the Company"), a global provider of cross-border mobile communication solutions, in collaboration with the Niigata Airport Promotion Council (Chairman: Hideyo Hanazumi, Governor of Niigata Prefecture), will conduct a campaign offering a free Korean eSIM with unlimited data and a local phone number to the first 500 passengers departing from Niigata Airport on night flights to Seoul between Wednesday, July 1, 2026, and Monday, August 31, 2026.

The campaign aims to promote the use of this route, which has seen increased convenience due to the daily operation of flights between Niigata and Seoul, and to expand the use of eSIMs, which support communication environments abroad.

An eSIM is an integrated SIM embedded in the smartphone itself. In recent years, eSIMs have gained attention as a highly convenient communication method due to the spread of compatible devices, their relatively low cost, the ability to reduce luggage, and the fact that they can be used immediately upon arrival without the hassle of swapping SIM cards, leading to their expanding use.

Our service, "eSIM square," allows you to start communicating in just two steps. We also offer 24-hour support via email and chat during use, providing peace of mind for beginners.

Background of the Campaign

Starting June 1, the "Niigata = Incheon (Seoul) route" has been increased from the previous three flights per week to seven, operating daily. This expands options for night flights, and further increases in tourism and business travel are expected.

This campaign is being conducted in collaboration with Niigata Airport to promote the use of the newly increased night flights and to provide more customers with an opportunity to experience eSIMs, which are gaining attention as a communication method for overseas travel.

Going forward, the Company will continue to aim to provide new value and communication environments that are convenient and easy to use for all customers through new initiatives and evolution.

Source: The "Niigata = Incheon (Seoul) route" will be increased to 7 flights per week and will operate daily starting June 1! https://www.niigata-airport.gr.jp/news/detail/?id=283

Campaign Overview

Campaign Details

For passengers flying on night flights from Niigata to Seoul who have registered as members of "eSIM square" before departure, we will provide a Korean eSIM with unlimited data capacity to the first 500 customers.

Target Period

Departures from Wednesday, July 1, 2026, to Monday, August 31, 2026

*The campaign will end early once the distribution limit is reached.

Eligible Flights

KE2198 Niigata (Dep. 20:20) → Incheon (Arr. 22:40)

Gift Details

Korean eSIM plan (with local phone number) provided by our service "eSIM square"

Data Capacity: Unlimited

Usage Days: Selectable according to stay duration from 3-day, 4-day, and 5-day plans.

How to Use

1 Register as a member of "eSIM square" before departure

https://esim.telecomsquare.net/ja

2 On the day of departure, receive a flyer at the airline's check-in counter.

3 Receive your eSIM according to the instructions on the flyer.

Notes

eSIM can only be used with compatible devices. Please check if your device is eSIM compatible before applying.

How to check: https://esimsquare.zendesk.com/hc/ja/articles/11450192572559-eSIM%E5%AF%BE%E5%BF%9C%E6%A9%9F%E7%A8%AE%E3%81%AE%E7%A2%BA%E8%AA%8D%E6%96%B9%E6%B3%95

Features of "eSIM square" Service

We address the challenges faced by eSIM beginners, such as "products and rate plans are complex and difficult to understand" and "setup and usage methods are unclear," allowing you to start communicating in just two steps. With a simple site design, we have eliminated complexity and made it easy for beginners to purchase and communicate without confusion.

Support System

For support during use, please contact us via the URL below. We will respond via chat or email.

Support Hours: 24 hours *Support is available in Japanese only.

https://hc.esim.telecomsquare.net/portal/ja/home

Company Overview

As a pioneer in mobile communication services for 30 years, Telecom Square Co., Ltd. has been delivering "peace of mind, convenience, and enjoyment" to travelers worldwide. The company continues to provide and challenge itself to offer "new value" that makes travel more free and enriching, including communication services such as Wi-Fi router rentals and sales of eSIM and prepaid SIM cards, as well as a share bike service in Honolulu, Hawaii.

Company Name: Telecom Square Co., Ltd. Representative: Yuji Yoshitake Headquarters: Tokyu Sanbancho Building 7F, 8 Sanbancho, Chiyoda-ku, Tokyo 102-0075 Founded: 1992 (Heisei 4) Number of Employees: 109 (as of January 1, 2026) Business Activities: Mobile communication services (provision of international mobile communication devices such as Wi-Fi router rentals, sales of eSIM and prepaid SIM cards, etc.), travel-related business (official agent for "Biki," a share bike service in Honolulu, Hawaii; operation of owned media such as overseas travel information) Corporate Website: https://www.telecomsquare.net/

FACT BOX

  • Source: PR TIMES
  • Category: キャンペーン