page_title: Seibu 4000 series
hierarchical_section_title: Seibu 4000 series
caption_attribution_description: English: A Seibu 4000 series EMU on a Seibu Chichibu Line local service 日本語: 西武4000系電車 한국어: 세이부 철도 4000계 전동차
context_page_description: The Seibu 4000 series is an electric multiple unit train type operated by the private railway operator Seibu Railway mainly on Seibu Chichibu Line services in Saitama Prefecture, Japan since 1988.
context_section_description: The Seibu 4000 series (西武4000系) is an electric multiple unit (EMU) train type operated by the private railway operator Seibu Railway mainly on Seibu Chichibu Line services in Saitama Prefecture, Japan since 1988.
caption: A 4000 series set on the Seibu Chichibu Line in August 2009
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