Crack the eggs in a mixing bowl. Add the dashi broth, erythritol, soy sauce, and a pinch of salt. Whisk using chopsticks until the erythritol dissolves.
Strain the egg mixture through a sieve into another bowl. Repeat a few times until completely smooth. Set the bowl aside.
Pour the oil into a small bowl. Fold a piece of kitchen paper and soak it in the oil. Set aside and place a shallow nonstick pan over medium heat. Wipe the pan with the soaked paper towel.
Once the pan is hot, pour in 1/3 of the egg mixture. Break any bubbles that have formed with the edge of the chopsticks and scramble gently and slightly. When the surface solidifies, fold the lower edge over. Fold 1 cm from the sides, then continue folding from the bottom to the top.
Push the egg to the bottom of the pan with chopsticks. Wipe the empty side of the pan with the oil-soaked kitchen paper and pour another 1/3 of the egg mixture into the empty space of the pan. Lift the folded egg to let the egg mixture run under it.
Fold again, from the bottom, side, to the top. Slide the eggroll to the bottom of the pan, wipe the pan with the oil-soaked paper towel, and pour the last of the egg mixture. Fold, roll, and take off the heat.
Transfer the egg roll to a sushi mat and tightly roll it. Let it rest for 5 minutes. Unwrap the egg roll and slice it into 2cm pieces.
Transfer to a plate. Serve with Japanese accompaniments like wasabi and pickled ginger. Enjoy!