Japan LOVES melon flavor. The melon flavor is hard to describe; it's DEFINITELY not "melon" as in "watermelon", it's more like a hybrid of cantaloupe (eww) and honeydew flavors. I *think* Japanese "melon" is derived from muskmelon, specifically Yubari melons, which are considered THE best melons - these are the ones that get sold for ridiculous prices. Two fetched an auction price of over 2.5 MILLION yen (over $30,000 US) back in 2008.
Melon-flavored drinks and snacks are almost ALWAYS colored a bizarre unnatural green color; the sodas are almost always a "cream" soda, and are made by brands such as Fanta, Kirin and Ramune. Some of my BEST summer memories involve melon soda floats, with SUPER creamy, fatty Japanese vanilla ice cream! Melon is also an EXTREMELY popular kakigōri (Japanese shaved ice) flavor; in fact, I have actually recreated melon soda at home with melon kakigōri syrup from the asian market and soda water, since I'm WAY too cheap to spend $4 for a single tiny can of imported melon soda from Japan.
Japan's love of melon flavoring becomes obvious when you consider their most popular liqueur - Midori. The name actually means "green", and the liqueur itself is made from those fancypants Yubari melons mentioned above. It's unique flavor makes some of my absolute favorite drinks...like Midori sours!
As you already know, I cannot STAND storebought sour mix- I always prefer to make my own. It makes a HUGE difference in flavor.
adapted from Fat Girl Trapped in a Skinny Body
1 1/2 oz Midori Melon Liqueur
1 1/2 oz Sweet & Sour Mix (preferably homemade)
1 oz Vodka
Splash of Lemon-Lime Soda (7-Up, Sprite or Sierra Mist)
Combine the Midori, Vodka and Sweet & Sour mix. Top with soda and garnish with orange slice. Serve over ice.