355831
The station gained its current name when the Teito Rapid Transit Authority ( known as Teito Kōsokudo Kōtsū Eidan in Japanese ) was privatised and became Tokyo Metro on April 1 , 2004 .
 Tokyo Metro
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Tokyo Metro