Tokyo 7 Days Solo Traveler: Best SIM/eSIM Options

For a solo week in Tokyo, an eSIM with around 10GB total is enough for most travelers — maps and translation apps barely use any data; video streaming is what actually burns through a data cap. Skip the pocket WiFi for a solo trip; it’s an extra device to carry for no benefit when it’s just you.

How much data do you actually need?

Rough per-hour estimates for the apps most solo travelers actually use (varies by video quality and settings, but useful for ballparking):

App / activity	Approx. data use
Google Maps navigation	~50-100MB per day of active use
Google Translate (camera mode)	~20-50MB per day
Messaging apps (LINE, WhatsApp, iMessage)	~10-30MB per day
Instagram / social media browsing	~500MB-1GB per hour
YouTube or video streaming (HD)	~1-1.5GB per hour
Video calls	~500MB-1.5GB per hour

Most solo travelers land around 3-5GB over 7 days — Maps running constantly, Translate’s camera mode, messaging apps, and checking social media at cafes, without streaming much video over mobile data. A 10GB plan covers that with room to spare, even if you stream a couple hours of video.

Recommended options

Mobal prices its 5G Unlimited tourist eSIM by the exact day, so a 7-day plan is priced for exactly 7 days — no rounding up to a longer bundle.

Tokyo-specific tips

Both Narita and Haneda have arrival-hall counters if you went with a physical SIM. Went with an eSIM instead? You can install and activate it before you even board your flight — no counter needed. Don’t count on train station WiFi for real-time navigation, either; it often requires an account signup per session and drops the connection between stations. If you’re conserving data on a busy sightseeing day, 7-Eleven and Family Mart locations offer free WiFi as a backup.

Prefer a physical SIM, or need a phone number?

If your phone doesn’t support eSIM, or you specifically need a Japanese phone number for calls, see our full Mobal vs Sakura Mobile comparison for the physical SIM options.

Frequently Asked Questions

Is 10GB really enough for a week in Tokyo?+

For most solo travelers using maps, translation, and messaging apps without streaming much video over mobile data, yes — most land around 3-5GB over a week. If you'd rather not think about a cap at all, Mobal's tourist eSIM is priced per day with unlimited data (a 15GB hotspot/tethering cap only applies if you're sharing the connection).

Do I need a pocket WiFi if I'm traveling alone?+

Usually not — a pocket WiFi router only makes sense when you're splitting the cost and connection across multiple devices or travelers. Solo, an eSIM on your phone is simpler and nothing extra to carry.

Can I install my Tokyo eSIM before I leave home?+

Yes. eSIM profiles can be installed in advance and switched on once you land, so there's no need to find WiFi at the airport to set it up.