Wikipedia
Keiō
was a after Genji and before Meiji. The period spanned the years from May 1865 to October 1868. The reigning emperors were and .
Keio (disambiguation)
Keio may refer to:
- Keiō (慶応), a Japanese era name
- Keio University (慶應義塾大学), a Tokyo University
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Keio Corporation (京王電鉄), a Tokyo-based transportation company
- See under 'Keio...' in :Category:Electric multiple units of Japan
- Keio Flying Squadron series or Keio Yuugekitai, the name of a video game series released on the Sega Mega CD\Sega CD, Sega Saturn, and Sony PlayStation consoles