Most Japanese Christians lived in Kyushu, but Christianization was now a regional phenomenon and had a national impact. By the end of the 16th century it was possible to find baptized people in virtually every province of Japan, many of them organized in communities. On the eve of the Sekigahara battle, fifteen "daimyōs" were baptized, and their domains stretched from Hyuga in Southeast Kyushu to Dewa in North Honshū (see Costa 2003). Hundreds of churches had been built throughout Japan.