Which of the following is not among the four main islands of Japan?

A. Hokkaido

B. Edo

C. Shikoku

D. Honshu

Edo or also known as Yedo and Jedo. It was the seat of energy for the Tokugawa shogunate, which ruled Japan from 1603 to 1868. Amid this period, it developed to end up plainly one of the biggest urban communities on the planet and home to a urban culture fixated on the thought of a "skimming world".