A supporter of Iranian presidential candidate Saeed Jalili
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Iran oil imports scaled back in Asia

Iranians head to the polls this Friday to elect their new president.

Iran is one of the biggest oil exporters to Asia, and so any political instability could impact the region.

Economic sanctions targeting Iranian oil started to bite last year, and since then some Asian customers have been scaling back their imports from the country.

BBC correspondents in Japan, China and India report on Iran's significance as an energy supplier to these nations.

Visit the BBC World News Asia Business Report website for more reports from the programme.