IMF chief economist Pierre-Olivier Gourinchas spoke at the Jackson Hole annual economic symposium on Friday. Gourinchas said that the Japanese central bank can continue to raise rates gradually, at a data-dependent pace, per Reuters. 

Key quotes

Inflation is higher than the bank's 2% target.
Inflation expectations have started to move "maybe even a little bit above" that target
BOJ's beginning to normalize monetary policy is "certainly something that we think is a good development for Japan.