Reliable connectivity matters more in Kyoto than it might elsewhere — you'll lean on maps for navigating bus routes, translation apps for menus and signage, and IC card top-up apps throughout the day. Free public wifi alone generally isn't enough to rely on.
eSIM: the easiest option for most travellers
If your phone supports eSIM (most phones from the last several years do), a Japan-specific eSIM data plan can be purchased and installed before you even leave home, activating on arrival with no physical swap or airport queue. This has become the default recommendation for most visitors — genuinely simple, and avoids the one common failure mode of physical SIMs (losing your home SIM card while it's out of the phone).
Physical SIM cards
Still available at the airport and some electronics stores for phones that don't support eSIM, or if you'd rather have a physical backup. Data-only plans are standard; voice-calling SIMs for tourists are less common and usually unnecessary if you're relying on messaging apps.
Pocket wifi
A rentable hotspot device, picked up at the airport and returned either at the airport on departure or by prepaid mail envelope, sharing one data connection across multiple devices — the strongest option for groups or families travelling together on one plan, though it's one more physical thing to carry and keep charged.
Free public wifi
Available at many train stations, some convenience stores and a growing number of cafes, but coverage is inconsistent and often requires a separate sign-up or app per network — workable as a supplement, not reliable enough as your only connectivity plan for a trip that depends on real-time navigation.