Best Japan eSIM with hotspot support

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Last checked: 2026-08-09

Quick picks

1. Saily — Best for travelers prioritizing the provider's stated unlimited hotspot-sharing language. Saily’s Japan eSIM page states that it offers “limitless hotspot sharing with friends and family.” [source-saily-com-77] This guide does not treat that wording as a statement about speeds, connected-device limits, coverage, or performance.

2. Ubigi — Best for clearly documented general tethering eligibility. Ubigi lists Japan as a destination, states that tethering is allowed, and says any Ubigi data plan can turn a smartphone into a hotspot. [source-cellulardata-ubigi-com-79] The supplied documentation does not specify a Japan-plan hotspot allowance, price, or duration.

3. Holafly — Include only with a current Japan-plan hotspot-limit disclosure. Holafly says its Japan eSIM can use a smartphone to create a Wi-Fi network and connect multiple devices. [source-esim-holafly-com-80] Its guidance says the destination plan’s technical specifications show whether hotspot use is included and the amount shareable per day. [source-esim-holafly-com-81]

1. Saily

Saily is the clearest match here if your priority is the provider’s stated “limitless hotspot sharing” language for its Japan eSIM. [source-saily-com-77]

Saily also publishes hotspot setup guidance for iOS and Android, describing phone-based tethering rather than a separate pocket Wi-Fi device. [source-support-saily-com-78]

Who it suits: Travelers who want to share their phone connection and value this specific published hotspot-sharing statement. [source-saily-com-77]

Watch-outs: Japan plan prices, durations, data allowances, and promotions are live and variable, so verify the current plan page before purchase. [source-saily-com-77] The published wording alone is not used in this guide to assess speeds, connected-device limits, coverage, or performance.

View Saily’s Japan eSIM options

2. Ubigi

Ubigi’s general documentation states that tethering is allowed and that any Ubigi data plan can turn a smartphone into a hotspot; Japan is among its listed destinations. [source-cellulardata-ubigi-com-79]

Who it suits: Travelers who prefer a provider with a plainly stated general tethering policy. [source-cellulardata-ubigi-com-79]

Watch-outs: The evidence available for this guide does not document a Japan-SKU-specific hotspot allowance, price, or duration. Confirm those details on the live Japan plan rather than assuming that general tethering eligibility answers them. [source-cellulardata-ubigi-com-79]

View Ubigi’s Japan eSIM options

3. Holafly

Holafly says its Japan eSIM can use a smartphone to create a Wi-Fi network and connect multiple devices. [source-esim-holafly-com-80]

Holafly also says to check each destination plan’s technical specifications for hotspot eligibility and the amount of data shareable per day. [source-esim-holafly-com-81]

Who it suits: Travelers willing to verify the exact hotspot limit on the current Japan plan before purchasing. [source-esim-holafly-com-81]

Watch-outs: The retrieved evidence does not provide a durable, plan-specific Japan hotspot allowance. [source-esim-holafly-com-80] Holafly’s general guidance mentions hotspot-sharing limits of up to 1 GB per day, but that is not proof of the allowance for a particular Japan SKU. [source-esim-holafly-com-82]

View Holafly’s Japan eSIM options

Before you buy: hotspot checks that matter

For an iPhone used with another carrier while travelling, Apple says the device must be unlocked. On iPhone, Settings > General > About displays “No SIM Restrictions” when it is unlocked. [source-support-apple-com-1]

Check the provider’s current Japan plan for a stated hotspot allowance or restriction. Sakura Mobile, for example, separately describes handset-data and hotspot-sharing limits on some unlimited products. [source-sakuramobile-jp-4] [source-support-sakuramobile-jp-6]

On a dual-SIM iPhone, Apple says Personal Hotspot uses the line selected for cellular data. [source-support-apple-com-2]

Apple says normal eSIM setup requires an internet connection, a compatible iPhone, an eSIM-supporting provider, and an active plan. [source-support-apple-com-1] [source-support-apple-com-3]

If hotspot is unavailable

On iPhone, Apple advises contacting the carrier if Personal Hotspot is unavailable even though cellular data is enabled, because the plan may need hotspot support. [source-support-apple-com-2]

Provider instructions can also matter. Japan Wireless, for example, documents enabling data roaming on its added eSIM and entering provider APN details when needed for hotspot setup. [source-japan-wireless-com-8] [source-japan-wireless-com-9]

Methodology

This is a remote, research-based guide based on the cited official documentation and current published terms. We compared documented setup states, device instructions, roaming guidance, APN checkpoints, and provider-specific qualifications. We did not physically test, purchase, install, activate, or use any eSIM.

Bottom line

Choose Saily if the provider’s stated limitless hotspot-sharing language is your main criterion, while keeping its stated scope in mind. [source-saily-com-77]

Choose Ubigi if you want clearly documented general tethering eligibility, then verify the live Japan-plan details. [source-cellulardata-ubigi-com-79]

Consider Holafly only after confirming the current Japan plan’s hotspot allowance and conditions. [source-esim-holafly-com-81]