Driving in Japan
Japanese driving conditions may vary substantially from what you are used to at home, so we recommend that you take some time to adjust to your new environment before driving on Japanese roads. In particular, ensure that you become familiar with Japanese road signs and the meaning of the kanji. (Located in back of the JET Diary)
Japan Automobile Federation issues "Rules of the Road," a book explaining Japanese driving rules.
For more information on JAF or the "Rules of the Road," go to the link below
http://www.jaf.or.jp/e/road.htm