Add the sake, liqueur and zucchini water to a shaker with ice, and shake until well-chilled.
Strain into a chilled coupe glass.
Top with the sake.
Garnish with a skewered cucumber ribbon.
*Zucchini water: Process 5 whole zucchinis through a juicer (which should yield 1 quart.) Add 1 oz. fresh lime juice, 1 oz. raw cane sugar and 1 barspoon vitamin C powder.