Kōshū or Koshu may refer to:

• {{nihongo|Kōshū|甲州}}
  • Kōshū, another name for Kai Province.
  • Kōshū, Yamanashi, the present city in Yamanashi Prefecture.
  • Koshu (grape), a variety of Grape. / 甲州 (葡萄)
• {{nihongo|Kōshū|向州}}
  • Kōshū, another name for Hyūga Province.
• {{nihongo|Kōshū|公州}}
  • Koshu, South Korea
• {{nihongo|Kōshū|膠州}}
  • Kōshū (survey ship), a ship of the Imperial Japanese Navy

• Johann H. Salver
• Johann Huelsemann
• Johann Hulsemann
• Johannhuth
• Johann H. von Madler
• Johann H. von Maedler
• Johann Hülsemann
• Johann I Bernoulli
• Johan Niclas Bystroem
• Johan Nicolai Storen
• Johan Nicolai Støren
• Johann I, Count Palatine of Simmern
• Johann I, Count Palatine of Zweibrücken
• Johann Ignaz Ludwig Fischer
• Johann Ignaz Schiffermüller
• Johann II Bernoulli
• Johann II, Burgrave of Nuremberg
• Johann II, Count Palatine of Simmern
• Johann II, Duke of Kleve-Mark
• Johann III Bernoulli
• Johann III, Burgrave of Nuremberg
• Johann III, Count of Sponheim-Starkenburg
• Johann I Josef, Prince of Liechtenstein
• Johan Niklas Bystroem
• Johan Niklas Bystrom