Where is Koga?

Koga-shi3.3 km · 2.1 mi → Nishifukuma3.7 km · 2.3 mi → Shingū3.9 km · 2.4 mi → Fukutsu Shi5.9 km · 3.7 mi → Munakata-shi10.7 km · 6.6 mi → Miyawaka Shi13.9 km · 8.6 mi → Sasaguri15.2 km · 9.5 mi → Fukuoka15.5 km · 9.7 mi → Miyata17.5 km · 10.8 mi → Umi18.8 km · 11.7 mi → Onga-gun20.8 km · 13.0 mi → Fukuoka-shi20.9 km · 13.0 mi →

Amagi33.41804, 130.65413 → Asakura Shi33.41684, 130.74167 → Buzen33.61153, 131.13002 → Buzen-shi33.56743, 131.08578 → Chikugo Shi33.20748, 130.49122 → Chikushino-shi33.49631, 130.51560 →