One question that emerged among the public immediately after Tokyo won the right to host the 2020 Olympics was whether Prime Minister Shinzo Abe made an incorrect statement, or told an outright lie, about the contaminated water issue at the Fukushima No. 1 nuclear plant.

During the Tokyo bid delegation's final presentation before the International Olympic Committee in Buenos Aires on Saturday, Abe stressed that the "effects from the contaminated water have been perfectly blocked within the (artificial) bay" of the wrecked nuclear complex, and said "the situation is under control."

Experts have long pointed out that irradiated water from the plant has kept gushing into the Pacific far beyond the man-made bay, although the government continues to claim that most radioactive materials have been contained within a silt fence that forms a barrier directly in front of reactor units 1 through 4. Reactors 1, 2 and 3 suffered core meltdowns in March 2011.