I
- (Tsushima-shi) Izuharamachi-oura
- (Tsushima-shi) Izuharamachi-kunehama
- (Tsushima-shi) Izuharamachi-kōtsuki
- (Tsushima-shi) Izuharamachi-komoda
- (Tsushima-shi) Izuhara
- (Minamimatsuura Gun) Iwaseura
- (Hirado Shi) Itanoura
- (Sasebo Shi) Ionourachō
- (Minamimatsuura Gun) Iwaseuragō
- (Minamimatsuura Gun) Imazato
- (Sasebo Shi) Imabukuchō
- (Matsuura Shi) Imafukuchō-higashimen
- (Gotō Shi) Ikkuyama
- (Hirado Shi) Ikitsuki Shima
- (Hirado Shi) Ikitsukichō-ichibu
- (Ōmura-shi) Ichinogō
- (Gotō Shi) Ichikira
- (Hirado Shi) Ikitsuki-ichibuura
- (Tsushima-shi) Izuharamachi-azamo
- (Tsushima-shi) Izuharamachi-are
- (Tsushima-shi) Izuharamachi-agami