The yen is approaching the key psychological level of 150 yen per dollar after the interest rate gap with the US widened due to hotter-than-expected inflation data. The currency traded just below that rate against the greenback on Friday morning in Asia amid speculation that Japanese authorities would intervene if the yen suddenly weakens. The Group of Seven reaffirmed its position that excessive moves are problematic, a senior finance ministry official said, during a meeting on Thursday in Morocco. Yuta Suzuki, vice president of MUFG Bank Ltd. in New York