Lot of these hotels wifi does not have secure connection. Connected to these unsecured wifi are taking very high risk. DYODD.3GB when you are on the road using GPS, Google Maps or just googling for information is definitely enough.
Most cafe and Shinkansen have wifi if that's where you are doing your casual web browsing.
Connected to wifi when back in hotel to upload photos.
Happy holidays.
Edit:
Yes, tried before
And if you are traveling next month or later, your Senior plan will have more then 3GB due to rollover data
When I travel overseas, only use mobile roaming data even the wifi connection is secure. You really don't know what are the infra behind the scene.