Luxury mobile options for group travel in Osaka during winter?

Hey fellow travelers! I'm organizing a premium group trip to Osaka this December for the New Year celebrations and winter illuminations. We're a group of luxury seekers and want the best mobile connectivity options available. I'm looking for high-end SIM cards, pocket WiFi with fast speeds, and top-tier data plans to ensure seamless communication for everyone in the group. Can anyone recommend luxury mobile solutions that cater to different needs within a group setting? I want to make sure we stay connected in style and comfort during our winter adventure in Osaka. Your suggestions would really elevate our travel experience!