iOS 1o Beta 2 has new public transit preferences in Maps Settings. Users can now set route suggestion preferences by foot, car or public transit. Public Transit also has it’s own setting to fine tune route suggestions. Users can use all or limit suggestions to certain types of transit such as subway, train, bus, ferry, etc. The Car and Navigation preference also includes toggles for filtering expressways and toll roads.
The beta 2 Maps app itself does not as yet display Japanese transit Information.
Update: I may have missed these in beta 1, oops. At any rate Japanese language localization is finalized in beta 2.