The oldest living person in Ōsakikamijima, Hiroshima is a 109-year-old man, who is presumably the oldest living man in the prefecture.

There are two 110-year-old women in Fukuyama, Hiroshima, the oldest of whom is Kaoru Kodera (小寺カヲル), who was born in November 1914. (The other woman was born in March 1915.) In addition, there are three 109-year-old women (Jan, Mar, and June 1916), as well as a 108-year-old man (Mar 1917).

The oldest living person in Tokushima City, Tokushima is a 108-year-old woman born in February 1917.

The oldest living people in Takamatsu, Kagawa are two 109-year-old people, of whom Yone Kunida (國田ヨネ) is the oldest, born in January 1916. These two women are numbers 4 and 5 in the prefecture.

The oldest living person in Amami, Kagoshima is a 106-year-old woman.

Credits to Straycat from the 110 Club: the oldest living person in Yawatahama, Ehime is a 109-year-old man. This obviously concerns Shigezō Kōno (河野重三), born on 31 March 1916, who is also the oldest living man in the prefecture.

After Ms. Furuhashi's death, Hamamatsu City reported the new oldest living person in the city became 110-year-old Ms. Komatsu Kawai (河合こまつ), (b. 1914.12.2) of Hamana Ward.
The oldest living man in the city is 107-year-old Mr. Masaichi Ichikawa (市川政一), (b. 1918.2.7) of Tenryū Ward.
https://www.city.hamamatsu.shizuoka.jp/documents/169585/2403.pdf

Still thanks to Straycat:

On September 19, 2025, prefectural officials visited 109-year-old Ms. Akino Hirano of Mihama Town, the oldest living person in Wakayama Prefecture, and presented her with a commemorative gift. According to reports, she is hard of hearing, but is doing well, using a walker to walk and write.
https://www3.nhk.or.jp/lnews/wakayama/20250919/2040020961.html