The Pakistani rupee strengthened against the US dollar, appreciating 0.08% during the opening hours of trading in the inter-bank market on Friday. At 10am, the currency was hovering at 280.97, a gain of Re0.23 against the greenback. On Thursday, the local unit closed at 281.20. Internationally, the Japanese yen was set for its steepest weekly drop in a year on Friday, as investors fretted