MoodSIM eSIM Data Plans for Japan

MoodSIM does not provide a truly unlimited data eSIM for Japan. All plans carry a fixed data allowance – the name “Unlimited” applies only to a daily quota (for example 1 GB/day for the 1 day plan, 2 GB/day for another 1 day plan, etc.). When the daily quota is consumed, speed is throttled to a reduced rate such as 256 Kbps, 384 Kbps, 512 Kbps or 1 Mbps, depending on the plan.

Travelers can choose from a range of fixed‑data options that still offer substantial high‑speed 5G coverage. Examples include the 20 GB 30 days plan and the 50 GB 30 days plan, both with 5G connectivity, as well as the 1 GB/day plans that drop to 384 Kbps after the daily limit is reached. These plans give clear data limits and predictable speeds, which can be more cost‑effective for most users than a plan that throttles after a small daily quota.

MoodSIM does not provide any Japan eSIM plan that includes a local phone number or SMS capability. All available plans from this provider are data‑only. Travelers can use popular VoIP applications such as WhatsApp, Telegram, and iMessage over the data connection for voice calls and messaging.

MoodSIM offers 39 single‑country plans and 52 multi‑country plans that include Japan. Those plans range in price from $2.90 for 500 MB of data up to $112.30 for 50 GB, with validity periods that can be as short as one day or as long as 365 days. Some options also support tethering and offer different data caps for varying speed tiers.