The Hanwa Line is a commuter rail line in the Osaka-Kobe-Kyoto Metropolitan Area, owned and operated by West Japan Railway Company. The 61.3 km (38.1 mi) line runs between Osaka and Wakayama, Japan and has a 1.7 km branchline in a southern Osaka suburb. The name is taken from the second syllable of Osaka and the first syllable of Wakayama.

Keihanshin is a metropolitan region in the Kansai region of Japan encompassing the metropolitan areas of the cities of Kyoto in Kyoto Prefecture, Osaka in Osaka Prefecture and Kobe in Hyōgo Prefecture. The entire region has a population of 19,302,746 over an area of 13,228 km2 (5,107 sq mi). It is the second-most-populated urban region in Japan, containing approximately 15% of Japan's population.