Best coverage for pocket wifi

Hi Everyone,
We are traveling in Japan in April and will be in Hakone, Takayama, Koyasun and Miyajima, as well as in big cities. I plan to rent pocket wifi, but most sell Y!mobile providers. Have anyone used pocket wifi in these areas? I was looking for Docomo, but very few vendors offer it.
I think I need a wide coverage vs fast speed.

Any suggestions?
Thank you,
Maria

I rented a pocket wifi from ToCoo and used it successfully in Hakone, Miyajima and Koyasan. Only really rural areas (i.e., off the main tourist map) will have coverage issues.

Try (Global Advanced Communications)
They're the best from 3 times experiences.
Great coverage + reasonable prices.

I used Global Advanced Communications too in 2014 and it was a wonderful experience. Will be using them again on this years trip.

I've used GAC for my trips in 2012, 2013, 2014 and 2015. I already have my MiFi reserved for May. It's very good.

I'm went to Koyasan with a GAC pocket wifi last year. It worked great in Koyasan, Mikyajima and Kinosaki Onsen. I did get the Premium Wifi option though.

On the Narita Airport website, it's said that GAC items can be picked up at the QL Liner counter at Terminal 1. But on GAC's website, it says pick up at the post office. I'm assuming there's no options to pick it up at the QL Liner counter or on the arrivals floor?

I did remember seeing several Pocket Wifi/Phone rental counters as I'm exiting the baggage area in Narita Terminal 1. Anyone happens to know which companies those are?

If there is a provision to pick it up at a location other than the post office, it's going to require you to do two things: mention and opt for it when you first reserve your unit and also you must pay the added fee for "special delivery" to that location.

I'm heading to Japan shortly too and was planning to go with GAC. Is the standard option enough for places like Hakone and Miyajima or would you need the premium? Or alternatively, has anyone tried the Eco option?