Visible in the lower left quadrant of this orthorectified image is Hakata Bay, located in the northwestern part of Fukuoka city, on the Japanese island of Kyūshū. It faces the Tsushima Strait, and features beaches and a port, though parts of the bay have been reclaimed in the expansion of the city of Fukuoka. The Bay is defined by Shoal Umi-no-nakamichi and Tombolo Shika-no-shima (Shika Island) to the north, and Genkai-jima (Genkai Island) to the northwest, and the Itoshima Peninsula to the west.
The bay is roughly 10 km from north to south, and 20 km from east to west, covering an area of roughly 133 km². The coastline stretches 128 km. The mouth of the bay is only 7.7 km wide, shielding it to a great extent from the waves of the Strait. The bay is only 10 metres deep on average, 23 m at its deepest point, though the tides bring a two metre change in the water level. Set routes are used, therefore, through the bay, to protect ships’ drafts. Several ships can be observed in the bay upon opening the full image, appearing as small white dots.