Open up and drain the can of bamboo slices.
Add half the toasted sesame oil to a small pan, heat up over medium heat.
Once hot, add the sliced bamboo shoots.
Sprinkle with black pepper and chili powder and stir to distribute.
After one minute, add the water, soy sauce, sake, mirin, oyster sauce, and chicken stock powder. Mix well.
Simmer uncovered until there is no liquid left.
Turn off the heat and drizzle the other half of the toasted sesame oil on the bamboo shoots. Mix well.
Once cool, they're ready to distribute and serve as a ramen topping. Alternatively, transfer the menma to a container and keep in the fridge for up to 5 days.