The Fukushima No. 1 nuclear power plant accident has sparked an unprecedented public debate on the nation's energy policy, and prominent figures are weighing in.

Last week, two entrepreneurs, Softbank Corp. President Masayoshi Son and Globis Corp. CEO Yoshito Hori, faced off in a three-hour discussion on the topic.

The mobile phone service mogul's position is that the Fukushima accident proved nuclear power is not viable and Japan should depend more on renewable energy resources.