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| "Trainset J1 of the JR East EMU 209-2200 series, “B.B.Base” |
I recently had the chance to ride the JR East Sōbu Line. As the train was leaving Makuhari-Hongō Station in Chiba City, I spotted a super-rare sight—the “B.B.Base” stopping in the railyard. Without a second thought, I hopped off at the next station and headed back to Makuhari-Hongō to photograph it.
B.B.Base is a one-of-a-kind train designed specifically for cyclists. Passengers can bring their bicycles onboard and secure them on dedicated racks. The service runs on weekends between Ryōgoku in central Tokyo and the Bōsō Peninsula in Chiba Prefecture. Its official name is trainset J1 of the JR East EMU 209-2200 series, nicknamed “Bōsō Bicycle Base.” The six-car set (four motor cars and two trailers) has space in every car except Car 4, which serves as an open lounge where passengers can relax and interact. Long benches are provided, while the other cars can each hold 19 or 20 passengers along with the same number of bicycles.
Originally built as a commuter train, this set operated on the Keihin-Tōhoku and Nambu Lines before being rebuilt as B.B.Base in 2017. Technically, its specifications are the same as other 209-2200 series trains—it’s the interior and purpose that make it stand out.
Now, you might be wondering: “Have you ever actually ridden B.B.Base?” or “Why not photograph it during regular service?” Well… that’s a tough one. The train leaves Ryōgoku terminal early in the morning, and I’m not exactly a morning person. On top of that, I’m not into heavy exercise like cycling, and my weekends have been pretty busy lately. Excuses, excuses—I know.
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| Close-up of B.B.Base Official JR East information: JR East – B.B.Base |