Janowo was formerly part of the German Empire. In the German Empire, the place was called Kulmischjanau.
The place is now called Janowo and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Janowo | German Empire | Kulm | before the Versailles Treaty |
| Janowo | Poland | Chełmno | after the Versailles Treaty |
| Kulmischjanau | German Empire | Kulm (Weichsel) | 1939 |
| Janowo | Poland | Chełmno | 1945 |
| Janowo | Poland | Bydgoszcz | 1992 |