Rakuten Mobile Guides & Tutorials 2026

Step-by-step guides for foreigners and international students using Rakuten Mobile in Japan. Complete tutorials on eSIM same-day activation, coverage maps by city (Tokyo, Osaka, Fukuoka, Hokkaido), student discounts, payment setup, Rakuten Link free international calls, and detailed comparisons vs Docomo ahamo, au povo, SoftBank LINEMO. Updated January 2026.