Possible Clues:

• Boss took over yard in old Asian capital
• 1997 environmental treaty site
• Bullet train stop
• Exotic Tokyo, Japanese city
• Japanese city — Tokyo (anag)
• Japanese city that's an anagram of "Tokyo"
• Residence of the Japanese imperial family for more than 1,000 years
• Japanese capital before 1868
• City in central Japan
• Japanese city of treaty on climate change