At a glance
Fixed local plans, preferably for 30 days. Any different validity period is shown with the price. A hotspot lets you share your phone’s internet connection with a device such as a laptop.
| Feature | HolySim | Saily |
|---|---|---|
| Network | NTT docomo / Rakuten Mobile / KDDI/au / SoftBank · 5G where available | Network partners not named. |
| 5 GB | €9.99 · 30 days | €9.99 · 30 days |
| 10 GB | €13.99 · 30 days | €15.99 · 30 days |
| 20 GB | €19.99 · 30 days | €21.99 · 30 days |
| 50 GB | €32.99 · 30 days | Not offered as a fixed local plan |
| Hotspot | Allowed on all compared plans. | Sharing allowed; usage is deducted from your data allowance. |
| Validity starts | At first connection at the destination. | Automatically at the destination; after 180 days the plan starts even without travel. |
| Top-ups | Extra data through My eSIM. | New plan on the same eSIM; automatic top-ups are optional. |
| Support | Email support in Dutch. | 24/7 chat support. |
All amounts are euro prices displayed by the provider, without a discount code. Promotions are marked. HolySim prices include VAT; possible payment or card fees at other providers have not been checked. A network name or 5G listing does not guarantee reception or speed at your location.
Where Saily is better
Saily can buy a new data plan when the previous one runs out if you enable automatic top-ups. That means less manual monitoring when your usage varies.
Hotspot use is allowed and chat is available 24/7. For 5 GB, you pay the same as with HolySim, so those terms may decide your choice.
Where HolySim is better
At 10 and 20 GB, HolySim is €2 cheaper on the date checked. A fixed 50 GB plan is also available for longer trips or more video use.
HolySim names NTT docomo, Rakuten Mobile, KDDI/au and SoftBank. The checked Saily page does not name a network partner, making a specific comparison harder before buying.
Which should you choose?
Choose Saily if…
Choose Saily if automatic top-ups, hotspot terms and in-app chat are your priorities. A follow-on plan is purchased at the full price.
Choose HolySim if…
Choose HolySim for the lower 10 or 20 GB price, a fixed 50 GB plan or the networks named in advance. At 5 GB, there is no price advantage over Saily.
Where these figures come from
We checked the published plans and terms on 16 September 2026. HolySim prices come from our own catalog. Saily prices come from its official range for Japan. We compare local plans; regional and worldwide alternatives are outside the table’s scope.
HolySim confirmed hotspot support for the compared eSIM Access plans on 16 September 2026.
Automatic top-ups use the full price, even if your first plan was discounted. The compared prices cover data; a phone number and calling plan are separate options.
- HolySim · plans for Japan. Consulted on 16 September 2026.
- HolySim · contact and support. Consulted on 16 September 2026.
- Saily · plans for Japan. Consulted on 16 September 2026.
- Saily · top-ups. Consulted on 16 September 2026.
This comparison is published by HolySim, which sells eSIMs itself. We use provider information and have not carried out our own speed or reception measurements. We review the comparison monthly. The prices shown are a snapshot; the price at purchase may differ.
About the publisher (Dutch)·Our editorial methodology (Dutch)