Like the recently added Indoor Maps for Narita International Airport, Apple Maps has silently added another missing feature: Lane Guidance. Neither feature is listed in iOS Feature Availability. The Taisy0 blog noticed the change.
It’s not clear who is supplying the data as Apple Maps Japan has only started mapping Tokyo and Increment P is still the only Japanese map source listed. Traffic has yet to be implemented so Apple Maps Japan is still very limited compared to mature full featured navigation systems which are standard equipment in almost all Japanese cars. I don’t have a car to test it right now but look forward to giving it a try on my next business trip.