Step 1.
- Muddle fresh blackberries in the bottom of a shaker.
Step 2.
- Add sake, fresh lemon juice, and simple syrup to the shaker.
Step 3.
- Fill the shaker with ice and shake well until chilled.
Step 4.
- Strain the mixture into a coupe glass.
Step 5.
- Garnish with a blackberry and a mint sprig.