Before Yoshigoro came to Hawaii he lived in the town of Kurogi.
His family address (The address assigned to the family koseki) was 293 0929 Kuwahara, Kurogi-cho, Yame-gun, Fukuoka-Ken.
In simple terms:
CHO (or MACHI) is a designation for town
(SHI would be a city and MURA would designate a village)
GUN is a designation for a "district" (which have no governing functions)
KEN is a designation for PREFECTURE which is the largest division in Japan of which there are 47.
Many times you may see Kurogi as Kurogi-machi.
Kurogi-machi actually does not legally exist anymore. On February 1, 2010, Kurogi, along with the town of Tachibana, and the villages of Hoshino and Yabe (all from Yame District), was merged into the expanded city of Yame.
Legally does not mean Kurogi-machi does not exist in reality. Many buildings, parks, landmarks, businesses and so on have kept the name Kurogi-machi.
Fukuoka prefecture (and thus Kurogi-machi) lay in the geographical most southern of Japans 4 large islands. This Island is called Kyushu.
Kurogi-machi is south east of the large port city of Fukuoka and North of Kamamoto as seen in the map below.