Possible Clues:

• Japan's capital before 1868
• Environmental protocol city in Japan
• City considered Japan's cultural capital
• Japanese city that's home to Nijo Castle
• Japan's "Eternal City"
• Japanese city with many shrines
• City with the Temple of the Golden Pavilion
• Japan's 'Eternal City'
• Japanese city whose name means "capital city"
• Shimogamo Shrine site