Cut shirataki noodles into manageable lengths. Mince the onion, celery leaves, and garlic. Dice the celery stalk and king oyster mushrooms into 5mm cubes.

Boil shirataki noodles for 3 minutes, then drain thoroughly.

Heat olive oil and garlic in a frying pan until fragrant. Add onion, celery stalk, and mushrooms, and stir-fry over medium heat until softened.

Add ground pork and stir-fry until the meat changes color.

Add minced celery leaves and stir briefly. Add sake, soy sauce, diced tomatoes, salt, pepper, and water. Cover and simmer on low heat for 10 minutes, then uncover and reduce the sauce.