Updated: 2024-11-13 16:19:03
For those planning a trip to Japan, it is essential to ensure you have internet access while there. To use the internet in Japan, you have several options: data roaming, a physical prepaid SIM card, an eSIM, or renting a Wi-Fi device.
Data roaming can be quite costly, so for travelers, these three options are more practical:
CDJapan Rental offers Unlimited pocket WiFi, SIM cards, and eSIMs for those traveling to Japan. If you book in advance, you can pick up a Pocket Wi-Fi device or SIM card at the airport upon arrival. The eSIM option provides access via Japan’s top network, Docomo, without the restrictions that roaming eSIMs may have, such as limited access to certain websites.
Prepaid SIM cards and eSIMs are convenient options for travelers. Here, we’ll go over the differences between SIM cards and eSIMs, as well as their respective benefits and drawbacks.
| Feature | Physical SIM Card | eSIM |
|---|---|---|
| Form and Installation | Insert a plastic SIM card | Register a profile on a built-in chip |
| Device Compatibility | Usable on almost all smartphones | Only compatible with certain models |
| Settings | Removable physically | Non-removable, as it’s built-in |
SIM cards can be used with any smartphone that supports Japan’s frequency bands. They can be removed and used across multiple devices, such as between iPhone, iPad, or Android devices. SIM cards are available at international airports and convenience stores in Japan, though prices tend to be higher at these locations. Therefore, it’s recommended to reserve a SIM card online before your trip for a lower price and to avoid waiting in line at the airport.
One advantage of SIM cards is the variety available. Japanese SIM cards offer good quality connections and increasingly high data allowances. They’re also widely available. Additionally, the ability to insert and remove the card allows for use across multiple devices.
Purchasing SIM cards at airports or convenience stores can be pricey, so reserving one in advance for pickup at the airport or your hotel is advisable.
An eSIM directly registers subscriber information onto a built-in SIM, meaning it cannot be used across multiple devices. However, it can be purchased and set up from anywhere with an internet connection, making it ideal for travelers who encounter delays or miss out on renting Wi-Fi or purchasing a SIM card upon arrival. Note, though, that only newer smartphones support eSIMs, so older models may not be compatible.
The primary advantage of eSIMs is the ease of online purchase, allowing immediate use. Unlike SIM cards or rental Wi-Fi, which can require advance reservation, eSIMs are instantly available and ready to use at any time.
A downside of eSIMs is that they are only compatible with certain devices, and unlike physical SIMs, they cannot be removed, limiting them to a single device.
| Feature | Physical SIM Card | eSIM |
|---|---|---|
| Device Compatibility | General smartphones that support Japan’s bands | Smartphones compatible with eSIM |
| Usability Across Devices | Usable across multiple devices | Fixed to one device |
| Purchase Locations | Airports, convenience stores, online stores | Mainly online stores |
| When to Buy | Recommended to reserve in advance | Available anytime, anywhere |
| Advantages | Wide selection, good connection quality, can be used on multiple devices | Easy purchase, immediate use |
| Disadvantages | Higher cost at airports/convenience stores, requires advance reservation | Limited to certain devices, fixed to one device |
