Possible Clues:

• Ensign on TV's 'Enterprise'
• Former Japanese P.M.
• Japanese leader of the 1960s
• Japan's P.M., 1964-72
• Prime minister Eisaku of Japan
• Former P.M. who shared a 1974 Nobel Peace Prize
• 1960's-70's Japanese leader
• Prime minister and Nobel laureate
• Takuma, Jenson Button's team-mate
• Japanese who won the 1974 Nobel Peace Prize