page_title: Tokyo Metro 9000 series
section_title: 1st batch
hierarchical_section_title: Tokyo Metro 9000 series / Variants / 1st batch
caption_attribution_description: 日本語: 営団9000系。優先席とボックス席（試作車）。
context_page_description: The Tokyo Metro 9000 series is an electric multiple unit train type operated by the Tokyo subway operator Tokyo Metro on the Tokyo Metro Namboku Line in Tokyo, Japan, since 1991.
context_section_description: Full-production four-car sets 02 to 07 were delivered in 1991 ahead of the Namboku Line opening, followed by an additional set in 1992, set 08, to act as a spare.
  The original four-car sets were reformed as six-car sets coinciding with the opening of the extension of the line from Yotsuya to Komagome on 26 March 1996. This was achieved by renumbering the centre cars (9200 and 9300) of sets 02, 04, 06, and 08 as 9600 and 9700 cars which were inserted into sets 01, 03, 05, and 07. New-build (2nd batch) intermediate cars (9200-9300-9600-9700) were then inserted into sets 02, 04, 06, and 08. The resulting minor differences led to odd-numbered sets 01 to 07 being classified as "A sets", and even-numbered sets 02 to 08 becoming "B sets".
caption: A transverse seating bay at the end of a prototype car
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