KT Japan Launched Pre-Departure Mobile Service
The new tt mobile service allows travelers to secure a Japanese phone number and SIM card before they leave Korea.
Updated on Oct. 5, 2026 in Telecommunications
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KT Japan has introduced a mobile virtual network operator (MVNO) service called tt mobile, which enables travelers to obtain a Japanese USIM card while still in Korea. By utilizing the NTT Docomo network, the service helps users secure a local phone number for banking and housing needs before they land in Japan.
Why it matters
The service solves a common hurdle for students, workers, and business travelers who previously struggled to obtain a Japanese phone number, which is often required to finalize local housing contracts and bank accounts. By allowing activation upon arrival, the platform streamlines the integration process for individuals relocating to the country.
Student plans start at 1,210 Japanese yen for 5GB and reach 3,300 Japanese yen for 50GB, while business plans range from 2,970 to 4,400 Japanese yen. All plans include an unlimited 200Kbps speed tier once the base monthly data allowance is exhausted.
The players
KT Japan
This organization operates as a telecommunications provider focusing on connectivity solutions for individuals moving between Korea and Japan.
NTT Docomo
This company is a major mobile phone operator in Japan that provides the network infrastructure used by the new tt mobile service.
The details
The service requires users to complete identity verification via passport and PASS authentication before receiving their USIM card. Business-tier customers receive additional benefits including unlimited domestic voice calls alongside their data allocation.
Timeline
October 5, 2026: KT Japan officially launched the tt mobile service.
December 31, 2026: The deadline for new applicants to receive a waiver for the 5,500 Japanese yen shipping fee.
The Tech Race
This service leverages the established NTT Docomo mobile network to provide seamless cross-border connectivity for international travelers. It marks a shift away from legacy roaming models that often prevent users from securing a local number before arrival.
Travelers can now finalize essential administrative tasks like opening a bank account or signing a housing lease immediately upon arriving in Japan. By avoiding the need to visit a physical store for a SIM card, users save time and can begin using their phone services as soon as they land.
The takeaway
Securing local digital services before moving abroad significantly reduces common logistical barriers for long-term travelers. Readers should verify their identity documents early to ensure they can take advantage of introductory shipping fee waivers.
What happens next
Applicants must complete their registration before December 31, 2026, to qualify for the waiver of the 5,500 Japanese yen international USIM shipping fee.
Further reading
For more information on current connectivity trends, visit our Telecommunications section.
Source note: This article includes information reported by 조선일보.
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