Just click on the bus icon instead of the car or the pedestrian.

We love Google Maps for buses, and also use it on our phones (android) when we travel, including Japan on our last trip in April 2016.

We used it recently for Hong Kong, which was a lifesaver as we could not find any printed bus maps - when we asked we were told there were too many bus routes to put on a map - well if cities like London can manage it, there's no excuse. But we found wifi access often enough that we were able to find buses via Google Maps, and hopped on a few during our week.

We were worried about getting lost ahead of our first trip in 2012, but we needn't have stressed. Firstly, for all the train trips, I used Hyperdia to not only note down exact times, but also exactly which platforms the trains would leave from and arrive into - particularly handy where we needed to make a change. And they were always on time, so we never missed a connection, not even the tight ones.

Announcements on trains and buses in tourist destinations were made in English as well as Japanese, and we'd written down the names in Japanese anyway, just in case we needed to recognise them visually. But station names were always shown in both English and Japanese, even at tiny rural stations.

It's a wonderfully easy country to navigate and people are extremely helpful if you do need assistance.

The only thing we struggled with was addresses in Tokyo, here an address is not street number street name format but three digits which tell you the chome (block), street and building number BUT the building numbers are often NOT in numerical order! It's a nightmare. Here is the one place we really really needed Google Maps / internet access. We had rented a wifi dongle for this purpose and thank goodness!

Frommer's has the clearest explanation of the difficulties of navigating Tokyo that I've seen:
http://www.frommers.com/destinations...ow/city-layout
and also has a very useful section on strategies for finding one's way around without getting lost (or at least, not too often):
http://www.frommers.com/destinations...getting-around

BUT, again, it is manageable -- in all honesty, I did not get lost <b>even once</b> in Tokyo, and I traveled there without a smartphone or other access to the internet. Places that tourists (and others!) visit know that the address system in Tokyo serves essentially no useful purpose for the vast majority of people -- even those who live in Tokyo! -- so they present information on their web-sites that allow people to find them, as do guidebooks.

You don't need two days (or nights) in Osaka.

Knowing your interests would help . . .

Apologies if I'm repeating advice already given, have speed-skimmed the thread.

I agree with BigRuss, two nights in Osaka is a lot. There's not a lot to see. Dotonbori can be seen in 10 minutes unless you're into bars and nightclubs, but it's pleasant enough to stroll around of an evening and have dinner there. Other than that, while there are sights you can see, there's nothing I felt was "do not miss" level. I liked the food market (but not as much as Nishiki in Kyoto or the fabulous Omichi in Kanazawa), there was a pretty temple halfway between Dotonbori and Sakai knife district, the knife museum and shop itself was hugely disappointing. So I'd give one of those nights over to Kanazawa giving you three nights two days there.

For Hiroshima and Miyajima, depending on what you want to do and see in Hiroshima you could do it in a single night but making use of the full days preceding and after. I'd recommend staying the overnight(s) on Miyajima rather than Hiroshima itself.

Go to Hiroshima early morning on the first day, spend a few or hours there -- we did the morning and lunch -- then get the ferry across mid afternoon to Miyajima for your overnight. That gives you the rest of the afternoon evening there, plus as much of the next day as you like before crossing back to the mainland and heading on to Osaka.

You will not get lost. It's all doable. We traveled independently with two elementary school children and did fine.

You can do some side-trips from Kyoto, too, but don't fix them yet. Definitely, include a day trip to Nara.

I suggest that you take advantage of the service that delivers your suitcases to your next hotel destinations, days ahead, if necessary. Very affordable and very convenient. Especially for Hakone, you should not carry any suitcases because a part of visiting Hakone is doing the Hakone loop. We arrived at our ryokan in Hakone doing the loop. If we had any suitcases, that would be very inconvenient. We just had a backpack and a big bag with just enough for 1.5 days. All our suitcases were already at our next destination, waiting for us. You can actually pack them by destination at home and send them to their destinations right from the airport. For example, upon arrival in Tokyo, we shipped a suitcase with our business clothes to Yokohama, which we were going to visit 10 days.

The only time I got lost was the first couple of times exiting my subway station in Tokyo. I simply went with the flow rather than observing which of the probably 8 exits I needed. I'd come above ground expecting to see my Starbucks and it was nowhere to be found! Other than that, I found Japan MUCH easier to navigate than I thought it would be. I'm heading back next month and am not concerned in the least. Even with the crush of humanity for sakura.