Bank of Japan Deputy Governor Hiroshi Nakaso has tempered market expectations that the bank will expand its stimulus program later this month, saying a cut in its inflation forecast would not be enough to justify more monetary easing. Nakaso, one of Governor Haruhiko Kuroda’s two deputies, said that while slumping oil costs have pushed inflation back to zero, rising wages and a steady economic recovery will underpin a long-term rise in prices. Expectations that the BOJ might add to its stimulus program at a rate meeting on April 30 have helped send Japanese shares to a 15-year-high.