The Complete Guide to Pocket Wi-Fi in Japan for Extended (Long Term) Stays

Extended stays in Japan—whether for work, study, or slow travel—quickly reveal how essential reliable, high-quality connectivity is. Living in a new country for a month or more requires relying on map apps and translation tools and maintaining regular communication with colleagues and loved ones. A weak connection can turn simple tasks into daily frustrations.

If you’re a long-term traveler, you probably already know that spotty hotel Wi-Fi, crowded café networks, or expensive international roaming cannot support the rhythm of everyday life abroad. Navigation freezes at the wrong moment, your favorite apps struggle without a stable signal, and remote work becomes more difficult than it needs to be. A secure, consistent connection provides both convenience and peace of mind, especially when hopping between cities or settling into a routine far from home.

Among the several connectivity options available for extended stays, pocket Wi-Fi remains a favorite for its dependable speed and portability. Meanwhile, SIM cards and eSIMs appeal to travelers who prefer not to carry an extra device, and home fiber works well for those settling in a fixed residence, though installation can require paperwork and time. By understanding these options early, you’ll avoid connectivity setbacks and start your stay in Japan with confidence.

Understanding Long-Term Connectivity Needs in Japan (30–90+ Days)

Longer stays in Japan come with a different set of priorities. The scenarios below outline what typically works best for travelers settling in for 1-3 months.

30-Day Workation in Japan

A month-long workation requires consistent connectivity across video calls, cloud-based tasks, and navigation between cafés, coworking spaces, and sightseeing spots. Pocket Wi-Fi stands out here because it delivers a stable, uninterrupted signal and generous data allowances that support work-intensive days. Unlimited data plans—combined with the ability to connect multiple devices simultaneously—make it easy to share the router with a coworker or partner without sacrificing speed.

60-Day Extended Stay

Travelers on a 2 month sightseeing trip tend to favor simplicity. For this reason, they most likely prefer not to carry an additional device. eSIMs and traditional SIM cards are excellent options for light-to-moderate data users who rely on maps, messaging apps, and occasional streaming but do not need constant high-capacity connectivity. Activation is typically quick, with no charging or tracking required.

Plus, travelers who move between cities or stay in accommodations where Wi-Fi is occasionally available may find that eSIMs and SIMs strike the right balance between price and convenience for a 60-day stay.

90-Day Study Trip

Students spending up to three months in Japan face additional challenges: they must enroll in classes, communicate with new people, and navigate daily life without relying solely on campus Wi-Fi. Local SIM cards can be cost-effective, but obtaining one usually requires a Japanese address and some basic Japanese-language communication—steps that can feel overwhelming right after arrival.

Pocket Wi-Fi becomes a practical alternative if avoiding paperwork or language hurdles is a priority. Students can move freely between dorms, cafés, and libraries without worrying about installation procedures or contract terms, making pocket Wi-Fi a dependable companion for the whole 90-day study period. Naturally, the connection can be shared among classmates or roommates, dividing the cost by two.

Long-Term Japan Wi-Fi Rental Options

As we have seen, extended stays call for reliable connectivity solutions that balance cost and convenience. Below, we introduce several of NINJA WiFi’s plans that are ideally suited to longer stays—whether for work, study, or sightseeing.

NINJA WiFi Plans for 30 Days

Travelers staying 1 month in Japan have access to several straightforward options:

• SIM Card: The Infinite Unlimited Plan offers 30 days of unrestricted data for 9,900 yen, making it a practical choice for anyone who prefers a direct phone connection with no data cap.
• eSIM: Digital activation offers a streamlined setup and allows travelers to skip pickup or delivery entirely. NINJA WiFi offers four data tiers for 31 days to suit different needs: 10GB for 5,599 yen, 20GB for 6,699 yen, 50GB for 13,156 yen, and 100GB for 18,403 yen.
• Pocket Wi-Fi (SoftBank): Travelers who prioritize stable, shareable connectivity can rent an Unlimited Plan device at 440 yen per day, totaling 13,640 yen for 31 days. The router delivers 1GB of high-speed data per day, followed by continued access at reduced speeds—proper for maps, messaging, and general browsing without interruption.

NINJA WiFi Long-Term Plans for 60 Days

Those staying for 2 months can access longer-range SIM options on SoftBank’s 5G network. NINJA WiFi’s 15GB plan at 3,740 yen, 30GB plan at 5,082 yen, and 50GB plan at 7,205 yen all offer clear, predictable pricing for extended stays. The lower cost compared to month-to-month rentals makes them appealing to travelers who combine light browsing and streaming with sightseeing, as well as to students who need steady access to communication apps and online coursework.

Affordability is a key consideration when budgeting for a 2 month trip, and these SIM plans offer a practical alternative for users who do not need unlimited data but still want reliable nationwide coverage.

Convenience Features for Long-Term Users

Rental flexibility often makes a bigger difference than travelers expect, especially during multi-city itineraries. NINJA WiFi offers pickup and return services at 10 airports across Japan, allowing long-term visitors to start their trip with a working connection and return the device just before boarding. Additionally, long-distance returns, such as collecting a router in Tokyo and returning it in Okinawa, remove the pressure of planning travel around a single location.

NINJA WiFi’s coverage extends across Japan’s major urban centers and smaller towns where free Wi-Fi is limited, so travelers who rely on translation apps, navigation tools, and social media throughout their stay benefit from a consistent signal that keeps each day running smoothly, regardless of where their itinerary takes them.

How to Reduce Your Long-Term Pocket Wi-Fi Costs

Long-term visitors can keep their connectivity expenses under control with a few practical strategies. Minor adjustments can make a noticeable difference over several weeks or months; let’s see how.

Book a Monthly or Long-Term Plan

Daily rental fees may seem manageable at first, but they add up quickly once your stay extends beyond a few weeks. A monthly or long-term plan offers clearer value, giving you a predictable price instead of a growing stack of daily charges. Travelers typically appreciate the peace of mind that comes with knowing exactly what they will spend on connectivity for the entire month.

Share Your Connection With a Travel Partner

Pocket Wi-Fi remains one of the most cost-effective solutions for families, friends, or coworkers traveling together. Since a single router supports multiple devices simultaneously, everyone in the group can stay online while splitting the rental cost. In practice, sharing often halves the per-person cost. NINJA WiFi’s approach to unlimited data helps even more: once you exceed the daily high-speed limit, the connection continues at reduced speeds, still supporting essential tasks.

Consider a Local SIM if Staying Over Six Months

If you’re planning to remain in Japan for more than half a year, you may benefit more from exploring local SIM options. Many Japanese carriers offer competitively priced long-term plans, but they typically require a local address, identification documents, and basic proficiency in Japanese. Pocket Wi-Fi can serve as a reliable bridge during this transition period: you can remain fully connected while settling into housing, gathering the required documents, and completing the registration process for a long-term SIM, without rushing any step.

Choose a Provider With Reliable Support

Naturally, quality customer support becomes increasingly important the longer you stay in a foreign country. Clear explanations, responsive assistance, and staff who can address issues in English make a significant difference when dealing with technical questions or plan adjustments.

NINJA WiFi offers support every day, and their routers are intentionally simple to operate: turning on the device and entering the password is all it takes to reconnect. Of course, you’ll still need to take care of your pocket Wi-Fi—charging it overnight, keeping it secured in your bag, and checking it periodically.

Conclusion

Whether planning a month-long workation, a 2 month exploration of several regions, or a complete 90-day study program, choosing the right Wi-Fi solution shapes the rhythm of your trip. As we’ve seen, pocket Wi-Fi stands out for its stability, portability, and ease of use.

At the same time, long-term visitors benefit from other rental options, including SIM and eSIM plans. Understanding how each option fits your travel style helps you avoid unnecessary costs, stay organized, and enjoy a more seamless experience throughout your time in Japan.

If you’re planning to stay in Japan for a month or more, consider booking a plan with NINJA WiFi to ensure you start your trip with a secure, reliable connection that supports all your online activities.