city of Ogi) Kitatakaki District (北高来郡), Nagasaki (The towns of Iimori, Konagai, Takaki, and Moriyama merged with the town of Tarami from Nishisonogi District and the city of Isahaya to form the city of Isahaya) Shimoge District (下毛郡), Ōita (The towns of Honyabakei, Yabakei, Yamakuni, and the village of Sankō merged into the city of Nakatsu) March 3, 2005 Minamiamabe District (南海部郡), Ōita (The towns of Ume, Kamae, Kamiura, Tsurumi, Yayoi, and the villages of Naokawa, Honjo, and Yonoutsu merged with the city of Saiki to form the city of Saiki) March 19, 2005 Nishikubiki District (西頸城郡), Niigata (The towns of Nose and Oume and the city of Itoigawa merged to form the city of Itoigawa) March 20, 2005 Ukiha District (浮羽郡), Fukuoka (The towns of Ukiha and Yoshii merged to form the city of Ukiha) March 22, 2005 Kojima District (児島郡), Okayama (The town of Nadasaki merged into the city of Okayama) Kamo District (賀茂郡), Hiroshima (The town of Yamato merged with the town of Hongo from Toyota District, the town of Kui from Mitsugi District, and the city of Mihara to form the city of Mihara) Asa District (厚狭郡), Yamaguchi (The town of San'yō merged with the city of Onoda to form the city of San'yō-Onoda) Ōtsu District (大津郡), Yamaguchi (The towns of Heki, Yuya, and Misumi merged with the city of Nagato to form the city of Nagato) Hita District (日田郡), Ōita (The villages of Maetsue, Nakatsue, Kamitsue, and the towns of Ōyama and Amagase merged into the city of Hita) March 28, 2005 Higashikatsushika District (東葛飾郡), Chiba (The town of Shonan merged into the city of Kashiwa) Kaizu District (海津郡), Gifu (The towns of Hirata, Nanno, and Kaizu merged to form the city of Kaizu) Mitsugi District (御調郡), Hiroshima (The town of Mitsugi and Mukaishima merged into the city of Onomichi) Munakata District (宗像郡), Fukuoka (The village of Ōshima merged into the city of Munakata) March 31, 2005 Atetsu District (阿哲郡), Okayama (The towns of Ōsa, Shingō, Tetta, and Tessei merged with the city of Niimi to form the city of Niimi) Jōbō District (上房郡), Okayama (The town of Hokubō merged with 8 towns and villages from Maniwa District to form the city of Maniwa) Kōnu District (甲奴郡), Hiroshima (The town of Sōryō merged with 5 towns from Hiba District and the city of Shōbara to form the city of Shōbara) Hiba District (比婆郡), Hiroshima (The