This article describes the regions of Japan. Kansai, located just west of the center of Japan's main island of Honshu, includes cities like Osaka, Kyoto, and Kobe. Hiroshima sits in another region, Chuugoku, located in the far west of Honshu. Besides Hiroshima, Chuugoku also includes Okayama and Yamaguchi, among other small cities.
I love how Yukino probably was just thinking to make some nice food and get closer to the neighbour she's got a big crush on, only for that neighbour to then immediately ask her out and kickstarting the relationship