@
amw3000 You may want to look into iVideo
https://www.ivideo.com.tw/english/japanwifirental I saw this reviewed & promoted on the Tokyo Lens YouTube channel
ETA: Also check the usage policies for specifics. Unlimited high speed data in Japan is always a fast one. Someone's paying, either full speed overage charges (GAC has this for specific model), cutoff at X per Y days or hours, or "high speed" for ZZZ MB then off to 128/256 kb or hard stop.