No, eSIMโOn Shop does not provide a truly unlimited data eSIM for Japan. All available plans are fixedโdata offerings with caps such as 10GB, 20GB, or 50GB for the specified validity periods. For travelers who need a generous data allowance, the 50GB 30โday plan priced at $42.50 or the 50GB 180โday plan at $70.00 offer substantial usage options, while a 20GB 30โday plan is available for $20.50. Choosing a fixed data plan can be more costโeffective for most visitors unless they require constant, highโvolume data usage beyond the set limits.