What is the best eSIM for Japan and Asia?
For a Japan trip, Ubigi is the standout: it runs on NTT, Japan's premium network, with strong local pricing. For multi-country Asia itineraries, a regional Asia plan from Airalo or Saily beats stacking country bundles; check that every stop on your route is on the plan's country list.
Asia is where travel eSIMs shine brightest: local SIM counters mean queues and paperwork in some countries, while an eSIM has you online the moment you land. Japan is the showcase case: Ubigi's parent company is part of NTT, which means you ride a top-tier local network rather than a reseller's second-choice roaming deal, and its Japan pricing is consistently among the sharpest.
For the classic multi-stop itinerary (think Thailand, Vietnam, Singapore, Indonesia), regional plans win on simplicity: one eSIM, one bundle, every border crossing invisible. Airalo's Asia regional plans cover the widest list of countries, and Saily's regional options pair well with its clean app and Nord pedigree. Compare the per-country coverage list against your route before buying; "Asia" plans differ on exactly which countries are included, and China connectivity has quirks worth checking separately.
Data tip for the region: navigation, translation apps, and QR-code-everything (payments, menus, trains) make Asia trips data-hungrier than European ones. Take at least 1 GB per day, or an unlimited plan for city-hopping weeks, and as always: install and verify at home, activate on landing.