After voters in Taiwan approved Saturday a referendum to maintain a ban on food imports from five Japanese prefectures, imposed after the 2011 Fukushima nuclear disaster, concern is stirring about the impact of the result on bilateral relations.

About 7.8 million of Taiwan's 19.76 million eligible voters approved the measure — more than the 25 percent needed to make the outcome valid.

The result immediately prompted speculation about why the referendum had succeeded, and what happens next.