Step 1.
- Fill a wine glass with ice.
Step 2.
- Pour 3 ounces of sake over the ice.
Step 3.
- Add 2 ounces of fresh grapefruit juice.
Step 4.
- Top with 2 ounces of soda water.
Step 5.
- Gently stir to combine.
Step 6.
- Garnish with a slice of grapefruit and a sprig of mint.