Mumbai, Nov. 5 -- Japan's central bank may be moving towards a more flexible approach to monetary tightening, with policymakers debating the size of future interest rate increases rather than sticking to fixed 0.25 percentage point increments, according to the minutes of the Bank of Japan's September meeting released Thursday. Several policymakers warned that inflation could exceed the BOJ's 2% target and supported further rate increases, while stressing the need to respond flexibly to domestic and overseas economic developments. The BOJ raised its policy rate to 1.25% from 1.0% in September before holding it unchanged at its October meeting. While members differed on the timing of further tightening, markets are increasingly anticipating a...