Mumbai, May 25 -- The Japanese yen appreciated below the 159-per-dollar level on Monday, rebounding from recent three-week lows as softer oil prices and renewed weakness in the US dollar improved sentiment toward the currency. Optimism surrounding a potential US-Iran agreement fueled expectations that the strategically vital Strait of Hormuz could reopen, easing concerns over global energy supply disruptions and offering significant relief to major Asian oil-importing economies such as Japan. Meanwhile, Japan's core inflation rate slowed to a four-year low in April, reinforcing expectations that the Bank of Japan may maintain an accommodative monetary stance in the near term. The yen also benefited from a pullback in the dollar index, whi...