I
- (Sodegaura-shi) Ishikawa
- (Sodegaura-shi) Idojiri
- (Sodegaura-shi) Ishagoda
- (Sodegaura-shi) Inokuradai
- (Sodegaura-shi) Ichigahara
- (Sodegaura-shi) Iwaisaku
- (Kisarazu Shi) Ishizawa
- (Kisarazu Shi) Ishigawara
- (Kisarazu Shi) Izui
- (Kisarazu Shi) Izumiyatsu
- (Kisarazu Shi) Ichinono
- (Ichihara Shi) Iriyamazu
- (Ichihara Shi) Izumidai
- (Ichihara Shi) Itohisa
- (Ichihara Shi) Imadomi
- (Ichihara Shi) Itabu
- (Ichihara Shi) Ishigami
- (Ichihara Shi) Ishizuka
- (Ichihara Shi) Ikewada
- (Ichihara Shi) Iwa
- (Ichihara Shi) Ishikawa
- (Ichihara Shi) Ichiba
- (Ichihara Shi) Isogaya
- (Ichihara Shi) Inunari
- (Chōsei-gun) Inatsuka
- (Chōsei-gun) Iio
- (Chōsei-gun) Iwakawa-shimo
- (Chōsei-gun) Imaizumi
- (Chōsei-gun) Iwakawa-kami
- (Isumi-gun) Itō