The JASDF dropped the F-15SE from their F-X shortlist a month ago because they supposedly wanted a brand new aircraft.
http://www.aviationweek.com/aw/generic/story_channel.jsp?channel=defense&id=news/awst/2011/04/25/AW_04_25_2011_p35-314011.xml
Hmmmm... and how does the F/A-18E/F qualify as a “new” aircraft anymore than the F-15SE?