Hey David,

You'll want to look at the rearview camera and navigation system - I don't believe the nav works outside of JP. The JDM also have folding automatic mirrors (button on the center armrest console). Is that one of the lighter interiors or darker?

Here are some other differences based on research:

Japanese Exterior:
5 Exterior colors (White, Black, Blue, Green and Red - 25 Colors on 175 LTD version)
Wheels: Matte 16 inch or Chrome 16 inch on 175 LTD version
Headlights: Direct Quartz Bulb
Right Side Fender Mirror
Round Side Marker Lights behind wheel well
Black Grill Fangs (no covers)
Keyed Entry
Electric Folding Heated Door Mirrors

Japanese Interior:
Cloth Patterned Seats (2-tone leather on 175 LTD version)
Momo Steering Wheel
Rear View Camera plus 2-DIN TV/Cassette Stereo w/Sat-Nav Option
Short Center Arm Rest
No Rear Headrests

Japanese Technical:
3.2 L Engine
Stiffer Suspension Settings
2Lo 2Hi TOD

-- John