The grandfather who created Hoisu had owned a liquor store before the war and wanted to recreate the flavour of a Western liquor he’d drunk in Europe. That liquor is rumoured to have been whisky, which is pronounced “hoisuki” in Japanese, hence the name “Hoisu”. While Hoisu is said to contain 0.2-percent alcohol, making it more like a mixer, it’s been dubbed a “phantom sake” due to its rarity and the fact that its ingredients are a closely guarded secret.