If you go to the center of Japan, this carefully selected image is enough! “Tokyo Osaka Kyoto Fukuoka Kanazawa train and bus route map” Introducing the convenience of trains and buses by region.

When traveling, you will definitely need a public transport map!
However, there are too many things that are hard to see, so I carefully selected them ^^

Postscript: The number of stars is the recommendation level of the transportation. The more flights there are, the easier it is to use. The maximum is five.

Train

Tokyo (☆☆☆☆☆)

https://www.flickr.com/photos/kzaral/3372202135/in/set-72157615721350412

https://www.jreast.co.jp/e/info/map_a4ol.pdf

Osaka (☆☆☆☆)

https://www.flickr.com/photos/kzaral/3372201325/in/set-72157615721350412

Nagoya (☆☆☆☆)

https://www.flickr.com/photos/kzaral/3372200841/in/set-72157615721350412

Fukuoka (☆☆☆☆)

https://www.flickr.com/photos/kzaral/3987572522/in/set-72157615721350412

Kyoto (☆☆☆)

https://www.jrpass.com/maps/map_kyoto_metro.pdf

Because it is not copyright-free, commercial use is not possible, but it was the easiest and accurate map to see in the search.
Pasted is a JPEG version, but you can download the PDF and JPEG versions from the original site.
(Original site:http://www.mukiryoku.com/railmap_e.html,Kyoto unknown)

Bus

Tokyo (☆☆)

https://www.kotsu.metro.tokyo.jp/eng/document/bus_map_ov_sm.pdf

Buses in Tokyo are very crowded and the routes are difficult to understand.

You can think that the only bus you use is the one that goes from the airport to the city center.

Kyoto (☆☆☆☆)

https://www.city.kyoto.lg.jp/kotsu/cmsfiles/contents/0000019/19770/ENG2020(MAP)0300.pdf
(Original site:https://www.city.kyoto.lg.jp/kotsu/page/0000019770.html)

Kanazawa (☆☆☆☆☆)

http://www.hokutetsu.co.jp/tourism-bus/castle-town
(No map in English)

Buses are more prosperous in Kyushu, but there is no foreign language version.

I will introduce Kyushu as soon as I understand it.

In addition, it is overwhelmingly convenient to use these transportation systems with transportation IC cards such as SUICA and PASMO.
How to make and how to refund are introduced in the following article.

交通系ICカードの購入方法と払い戻し方法について説明します！|SUICA,ICOCA,PITAPA等