Ingredients

   
2oz Japanese whisky
  Soda water, well chilled
  Ice
  Lemon twist (optional)

Steps

  1. Chill a highball glass in the freezer for at least 10 minutes.

  2. Fill the glass with ice. Pour in whisky.

  3. Top with cold soda water. Stir gently — once, vertically — to combine without killing the carbonation.

  4. Garnish with a lemon twist if using.

Notes

  • The ratio is roughly 1:3 or 1:4 whisky to soda. Adjust to taste.
  • Everything must be cold. Glass, whisky, soda. This is the entire technique.
  • Stir once. Over-stirring flattens the drink.
  • Suntory Toki and Nikka Days are the standard choices — light, clean, built for mixing.