| Date - Field | Japan - Geography - note |
2009 January Geography - note | strategic location in northeast Asia |
2008 January Geography - note | strategic location in northeast Asia |
2007 January Geography - note | strategic location in northeast Asia |
2006 January Geography - note | strategic location in northeast Asia |
2005 January Geography - note | strategic location in northeast Asia |
2004 January Geography - note | strategic location in northeast Asia |
2003 January Geography - note | strategic location in northeast Asia |
2002 January Geography - note | strategic location in northeast Asia |
2001 January Geography - note | strategic location in northeast Asia |
2000 January Geography - note | strategic location in northeast Asia |