page_title: E331 series
hierarchical_section_title: E331 series
caption_attribution_description: English: JR East E331 series set AK1 at Soga Station on a Keiyo Line service 日本語: 京葉線 E331系
context_page_description: The E331 series was an electric multiple unit train introduced experimentally from 2007 on commuter services on the Keiyo Line in Japan operated by East Japan Railway Company. Only one trainset was built, and it differed significantly from other JR commuter EMUs in having articulated cars with shared bogies and using direct-drive motors.
context_section_description: The E331 series (E331系) was an electric multiple unit (EMU) train introduced experimentally from 2007 on commuter services on the Keiyo Line in Japan operated by East Japan Railway Company (JR East). Only one trainset was built, and it differed significantly from other JR commuter EMUs in having articulated cars with shared bogies and using direct-drive motors.
caption: E331 series set AK1 in service on the Keiyo Line in May 2010
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