Genki Mobile’s 1GB per day Japan Travel eSIM uses NTT Docomo’s network, which offers the widest mobile coverage in Japan. This makes it suitable for travelers visiting major cities as well as countryside areas.
Because the eSIM connects to a local Japanese network, travelers can start using mobile data immediately after landing at airports such as Haneda or Narita, without needing to visit a counter or insert a physical SIM card.