Price per person per day
eSIM $11 for 5 days = $2.2/day. Pocket WiFi ¥220/day ($1.5/day) split across 4 people = $0.38/person. WiFi wins at 3+ people; eSIM wins solo.
2026-04-08 · Compare
日本のeSIM vs ポケットWiFi — どちらを選ぶ？
1名ならeSIM、3名以上ならポケットWiFi。2名の場合は？価格・利便性・電池持ち・性能の詳細比較。
Convenience
eSIM: nothing to carry, never forget, instant email delivery. WiFi: pickup at airport counter (15-30 min queue), return before departure, battery to charge nightly.
Battery life
eSIM uses phone battery (typical 10-20% hit for heavy use). Pocket WiFi has its own 3000-5000 mAh battery — doubles as a power bank with USB output on most models.
Speed in practice
Both use the same Japanese networks (Docomo primary). Speed is identical. Any differences are due to phone antenna quality, not the service.
Decision table
Solo 1-week: eSIM. Couple 1-week: either (lean eSIM if both have eSIM-ready phones). Family 4: Pocket WiFi. Business trip 3-day: eSIM. 30-day study: 30-day eSIM or monthly Pocket WiFi.
📱 eSIMプランを見る →
QRスキャン5分設定・24時間前まで無料キャンセル・Zalo/LINE 16時間サポート
