Japan should have declined hosting the 2020 Olympics because the country has to focus on what to do about nuclear power, former Prime Minister Morihiro Hosokawa, who is set to run for Tokyo governor, says in a recently published book.

Hosokawa was interviewed for "Ikegami Akira ga Yomu Koizumi Motoshusho no Genpatsu Zero Sengen" ("Akira Ikegami Reads Former Prime Minister Koizumi's Zero Nuclear Power Declaration)" and stresses the importance of pulling the plug on nuclear power.

"Rather than winning many gold medals in the Olympics, taking care of what to do with nuclear power now in this time is much more important for Japan's future," Hosokawa says in the book, which came out in late December.