K
- Kashima
- (Mito-shi) Koibuchi
- (Moriya-shi) Kakukama
- (Inashiki-shi) Kōda
- (Takahagi-shi) Kitakubo
- (Inashiki-gun) Kihara
- (Toride-shi) Katamachi
- (Omitama-shi) Katakura
- (Tsukuba-shi) Kamiōshima
- (Hitachiōmiya-shi) Kami-ose
- (Higashiibaraki-gun) Kamijuku
- (Kasama-shi) Kami-inada
- (Tsukuba-shi) Kamigō
- (Ishioka-shi) Kakioka
- (Hokota-shi) Kajiyama
- (Chikusei-shi) Kadoi
- (Hitachinaka-shi) Kaneage
- (Hitachinaka-shi) Kōya
- (Moriya-shi) Kubogaoka
- (Moriya-shi) Kamitsubo
- (Moriya-shi) Keyakidai
- (Moriya-shi) Kamimachi
- (Tsukubamirai-shi) Kinunodai
- (Tsukubamirai-shi) Kokinu
- (Tsukubamirai-shi) Komenojō
- (Tsukubamirai-shi) Kamiome
- (Jōsō-shi) Kanakōji
- (Bandō-shi) Kutsukake
- (Chikusei-shi) Kurogo
- (Hokota-shi) Kumiage