Ganjitsu

Ganjitsu was a Federation planet located in the Beta Quadrant. Ganjitsu's location near the Klingon Neutral Zone meant that a constant Starfleet presence was needed in the region, which throughout the mid 23rd century was led by the USS Aerfan.

In the 2240s, Hikaru Sulu and his family lived in the city of Ishikawa.

(TOS novel: Enterprise: The First Adventure).