MINT BLUE LINE SWINGER, a new release from Derailleur Brew Works, is a Kölsch that places mint aroma front and center. On its official online shop, the brewery says it uses a two-step approach: spearmint extracted through cold steeping and peppermint blended in as oil, while two hop varieties, Polaris and Perle, are used to balance the overall profile.

The style is Mint Kolsch, with an ABV of 5.0% and an IBU of 23. It is presented as a light-yellow beer with a highly drinkable body, designed to be easy to enjoy even in the colder season. The brew was handled by Okiyoshi Samurai.

Derailleur Brew Works is a brewery based in Nishinari Ward, Osaka City, and continues making beer rooted in Nishinari, the "town where people enjoy alcohol from the morning." Its official website emphasizes a commitment to valuing unconventional ideas and communicating not only the beer's taste, but also its labels and stories. This release is also striking for the way its poetic copy and recipe description are integrated, building up its world before the flavor itself.