In Japan, finding a Wi-Fi is a kind of easy. However, especially in Miyazaki, we, including Japanese people, cannot connect a Wi-Fi easily and smoothly. When we try to connect it, it requires us to register, which we have to send identification or phone number.
Here are two rent Wi-Fi services. They have useful and reasonable price system.
Check these out!!!
Ninja Wi-Fi https://ninjawifi.com/
WIFI-HERE.COM https://www.wifi-hire.com/en/accept-airport-jpn.html