Photographing subway trains has become part of my routine. Today, I’d like to share the sixth post in this series—the Chiyoda Line. The theme is “a subway line with two faces.” But before getting down to the main topic, as usual…
・What’s the Chiyoda Line?
It is the seventh-oldest subway line in Tokyo. It opened in 1969 and is operated by Tokyo Metro. The line is 24.0 km long and connects Kita-Ayase and Yoyogi-Uehara. A 5.0-km section, mainly in the east, runs above ground. The track gauge is 1,067 mm, and the line uses a 1,500 V DC overhead catenary system. The Chiyoda Line’s subway line number is “9,” and its line color is green.
Chiyoda Line trains run directly onto JR East’s Joban Line via Ayase and Odakyu’s Odawara Line via Yoyogi-Uehara. Tokyo Metro currently operates 16000 and 05 series EMUs on the line. Meanwhile, JR East’s E233-2000 series and Odakyu’s 4000 and 60000 series EMUs run directly onto the Chiyoda Line from their respective lines.
・A Train Operating in the City Center
All right then—please take a look at the photo above. You can see a green-striped, ten-car 16000 series EMU arriving at Shin-Ochanomizu Station in the city center. It wasn’t rush hour, but many passengers were waiting for the train, making the platform quite busy.
What a busy city Tokyo is!
・A Train Operating on the Local Section
Next, please take a look at the photo below. You can see a 05 series EMU arriving at Ayase Station. Doesn’t it look like a train on a local line? Furthermore, take another look at the photo. You can see the platform number for this local section—“0 (zero)!” What’s going on here?
Here’s the story behind it. The section between Ayase (this station) and Kita-Ayase Terminal (2.1 km) was originally a siding track. It was later converted into a revenue service track in 1979. Having said that, this section is treated as a branch line, so three-car 05 series trains mainly operate here.
The branch line’s new platform, Platform 0, was built adjacent to the existing Platform 1. To avoid changing the existing platform numbers (1 to 4), Platform 0 was assigned to the new platform.
A train had just arrived at Platform 0, but no passengers were waiting—so quiet.
I thoroughly enjoyed the two faces of the Chiyoda Line that day.







