Prepare the Salmon Filling: In a small bowl, combine the flaked hot smoked salmon, finely chopped red onion, Japanese mayonnaise, and lemon juice. Season with salt and cracked pepper to taste. Mix until well combined and creamy. Set aside.

Prepare the Cucumbers: With a sharp knife or mandoline, cut the cucumbers into thin slices. If desired, lightly salt the cucumber slices and set them aside on a paper towel to drain excess moisture. This will help keep the sandwiches from becoming soggy.

Prepare the Bread: Lay out the slices of fresh white bread on a clean surface. Spread a thin, even layer of cream cheese on one side of each slice. This will help to seal in the moisture and add a creamy texture to the sandwiches.

Assemble the Sandwiches: On half of the bread slices, spread a generous layer of the smoked salmon mixture over the cream cheese. Arrange the thinly sliced cucumbers on top of the salmon mixture, overlapping them slightly to cover the filling evenly.

Top and Trim: Place the remaining slices of bread on top, cream cheese side down, to form the sandwiches. Using a sharp knife, trim off the crusts for a neater appearance. Cut each sandwich into quarters, either into squares or triangles, depending on your preference.

Serve: Arrange the Chic Salmon and Cucumber Tea Sandwiches on a serving platter. Garnish with a sprinkle of cracked pepper or a small sprig of dill, if desired, for a touch of elegance. Serve immediately and enjoy these delicate, flavorful sandwiches.