was a town in Karatsu. As of 2003, the town had an estimated population of 5,895 and a density of 809.75 persons per km<sup>2</sup>. The total area was 7.28 km<sup>2</sup>.
Until January 1, 2005, Yobuko was part of the Higashimatsuura District of Saga Prefecture, Japan. Yobuko, along with the towns of Chinzei, Hamatama, Hizen, Kyà «ragi and à Âchi, and the village of Kitahata (all from Higashimatsuura District), was then merged into the expanded city of Karatsu.