Prepare the ingredients: Rinse the cucumbers with water, and then cut off both tips of the cucumbers.
Smash the cucumbers: Cut the cucumbers into bite size pieces. Place a piece of cucumber on the chopping board and smash them one piece at a time. Smash the cucumbers using a knife or smash them with the base of your palm to gently push it against the board without using a knife.
Mix the ingredients: Add the brown sugar, rice vinegar, dark soy sauce, black sesame seeds and sesame seed oil in the bowl, then toss to mix. Garnish with a little bit more sesame seeds and serve.