Pocket WiFi vs eSIM in Japan

eSIM Pros & Cons

Pros: No extra device to carry, activates instantly on arrival, buy before leaving home, usually cheaper for solo travelers
Cons: Only one device at a time, requires compatible phone (iPhone XS+, Samsung S20+), data can be limited

Pocket WiFi Pros & Cons

Pros: Connects multiple devices simultaneously, works on any device, often “unlimited” plans available, good for groups
Cons: Another device to carry and charge (8–12h battery), must return at end of trip, more expensive for solo travelers, “unlimited” can throttle at peak

Verdict by Traveler Type

Solo traveler with compatible phone: eSIM — simpler, cheaper, more convenient
Couple or family sharing devices: Pocket WiFi — better value
Traveler needing laptop data: Pocket WiFi or eSIM + tethering
Budget traveler: eSIM is usually cheaper day-by-day — book a Yesim eSIM in advance for the best price.