Longer Japan stays (study / work) need different connectivity than a 7-day tourist eSIM.

Four common paths

  • Data-only tourist SIMs (short)
  • Prepaid voice+data SIMs
  • Pocket Wi-Fi rentals
  • Home fibre / mobile contracts with Docomo, au, or SoftBank

Major carriers require residency documents for postpaid plans—bring passport, residence card, and student papers when you shop in-store.