Lexus GS 450h 2008 Owner's Manual page 288

3-3. Using the audio system
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DVD video discs
The DVD player conforms to NTSC color TV formats.
Region code: Some DVD video discs have a region code indicating
the region in which you can use the DVD video disc. If the DVD video
disc is not labeled as "ALL" or "1", you cannot use it on this DVD player.
If you attempt to play an inappropriate DVD video disc on this player,
"Region Code Error" appears on the screen. Even if the DVD video
disc does not have a region code, you may not be able to use it.
Symbols shown on DVD video discs
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Mark
286
Meaning
Indicates NTSC format.
Indicates the number of audio tracks.
Indicates the number of language subtitles.
Indicates the number of angles.
Indicates the screen display ratios available.
Wide screen: 16:9
Standard: 4:3
Indicates the disc' s region code.
ALL: In all countries
Number: Region code