Why are Hiroshima okonomiyaki restaurants full of “○○-chan”... their roots in the turbulent post-war period

Why are Hiroshima okonomiyaki restaurants full of “○○-chan”... their roots in the turbulent post-war period

[Yomiuri Shimbun] Micchan, Rei-chan, Ichan, Fuku-chan... All okonomiyaki restaurants that enter the commercial facility “Ekie” (Minami-ku, Hiroshima-shi) within the premises of JR Hiroshima Station, the gateway to Hiroshima, have “chan” attached to the store name. Okonomiyaki restaurants in Hiroshima prefecture often see the name “○○-chan”