I have booked 2 router, both worked in a very stabil way, nearly everywhere, only 2 areas were unstable, around Mount Fuji, Hakone area and during rides from Metro-Station to Metro-Station, what is normal in my opinion.
For my next trip, Japan Wireless is my first choice! Never change s running system 😊

This device and service very reliable. The rental cost is very affordable. HIGHLY RECOMMEND IT!

It was very user friendly, very useful for a first timer visitor like us because it keeps us connected on the internet and it can be used by other devices.

easy pickup at airport counter, easy drop off at lawsons

Easy to use, great price, way cheaper than cell plans, unlimited data, fast, reliable, and so convenient. They delivered to hotel exactly on time, and drop off at airport departure.

Everything was so simple and easy with this device. Would highly recommend

Great for reliable wifi around Japan.
Ordering, picking up and returning was easy process.

Speed and coverage are indeed privileged, plus extra power bank, need not to worry about battery loss

The process to rent a pocket wifi was very easy.

Equipment ready at hotel on arrival. Really easy to use. Good battery. No issues with connectivity. Would highly recommend Japan Wireless.