The yen was hovering around the 139.13 mark against the U.S. dollar at about 11:25 a.m. Hong Kong/Singapore time. The Japanese yen rose on Friday morning in Asia, on the back of a report that the Bank of Japan could potentially "discuss tweaking" its yield curve control policy at today's policy meeting. Under its yield curve control policy, the central bank targets short-term interest rates at -0.1% and the 10-year government bond yield at 0.5% above or below zero. With inflation having exceeded the BOJ's 2% target, concerns are rising that Japan's relatively low interest rates have made the yen less attractive and vulnerable to selling. Central banks around the world have raised rates aggressively to rein in on inflation, but Japan has continued to maintain an ultra-loose monetary policy and kept rates low.

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Persons: — CNBC's Lim Hui Jie Organizations: Nikkei, U.S, Bank of Japan Locations: Hong Kong, Singapore, Asia, Japan