Koga City is located in the south of Ibaraki Prefecture, with easy access to Tokyo and Saitama for commuters. It is known for its historical parks, such as Koga Park, which features over 1,000 cherry trees and the remnants of Koga Castle. The city's annual Koga Hanabi (fireworks) is popular. Local cuisine includes delicious sweet potatoes and "renkon" (lotus root) dishes.