China & Japan & South Korea
5G on 4 of 4 carriersChina mainland, Japan and South Korea have some of the most advanced mobile networks, but local SIMs can be complicated for visitors. An eSIM covering these three countries lets you stay connected across borders without buying separate plans.
Plans for China & Japan & South Korea
Pick a row — it prices the box abovePublic wifi
Japan and South Korea have many free wifi spots, but they often require sign-ups; China's public wifi can be restricted.
Payment
Card and mobile payment acceptance varies; Japan still uses cash in many small shops, while South Korea and China are more card/mobile-friendly.
SIM registration
Physical SIMs in Japan require ID for voice, but data-only travel eSIMs usually avoid this; in China, real-name rules apply to local SIMs but not typically to travel eSIMs.
Will this eSIM work in all three countries without changing settings?
Yes, it will connect to China Unicom, KDDI/au, SKTelecom or LG Uplus automatically as you travel.
Can I use 5G in Japan?
Yes, KDDI/au supports 5G, but coverage may be limited outside cities.
Do I need to register my eSIM in South Korea?
No, travel eSIMs are generally pre-registered and do not require local ID, but check current rules.
Are there any blocked services in China?
Many Western websites are blocked; a VPN may be needed.
Is coverage continuous on the Shinkansen or KTX?
High-speed trains have good coverage, but tunnels may cause brief drops.
What data allowance is enough for a two-week trip across the three countries?
5 GB or 10 GB is often sufficient for moderate use, but heavier streaming may require more.