The phrase (関西援交87旅行) is a specific niche keyword often found in the corners of Japanese adult entertainment forums, social media "bulletin boards" (BBS), and adult video (AV) titles.

Short for enjo-kōsai (compensated dating). This refers to a practice where individuals (traditionally younger women or students) provide companionship or sexual services to older men in exchange for money or luxury goods.

In Japanese internet slang, "87" is often used as a phonetic pun or a specific identifier. While it can sometimes refer to "Hana" (flower), in this specific adult context, it is frequently used as a code for certain dates, group identifiers, or specific amateur production tags.

Participants meet at a major station like Shin-Osaka or Kyoto Station.