Takamatsu serves as the capital city of Kagawa Prefecture on the island of Shikoku in Japan. Situated in central Kagawa within the Takamatsu Plain, which forms part of the larger Sanuki Plain, the municipality occupies a gentle slope that extends toward the Seto Inland Sea to the north. This geography creates a semicircular urban area centered around Takamatsu Port and the adjacent Takamatsu New Port.