Which of the four major japanese islands has been home to cities?

All four major Japanese islands have been home to cities. Here they are:

* Hokkaido: Sapporo, Otaru, Hakodate

* Honshu: Tokyo, Osaka, Kyoto, Nagoya, Hiroshima, Yokohama, Fukuoka

* Shikoku: Matsuyama, Takamatsu, Kochi

* Kyushu: Fukuoka, Kumamoto, Nagasaki, Kagoshima

It's worth noting that Honshu is the largest and most populous of the four islands and has the most significant concentration of cities.