Well - maybe - reading street and traffic signs in Japanese, reading road maps in Japanese, paying high tolls in Japanese (yen), buying $12.00/gallon gasoline - in Japanese, finding aforesaid gasoline - in Japanese.

You don't say whether you have ever been to Japan or speak/read any Japanese. For first-time visitors, I really recommend trains and other local transportation. JMHO - others don't share it.

JR