Bring a pot of water to a rolling boil and blanch 100 g bean sprouts for 1 minute.
Pour the blanched bean sprouts through a strainer and shake thoroughly to remove any excess water, be careful of the hot steam and water.
Add 1 tsp Chinese-style chicken bouillon powder, 1 tsp toasted sesame oil, ⅛ tsp Japanese chili powder (shichimi togarashi), ⅛ tsp black pepper, ½ tsp sugar and 1 tsp rice vinegar to a bowl and mix until combined.
Add the beansprouts to the bowl and mix thoroughly until evenly covered.