Wakame seaweed is a very common ingredient found in Japanese soups, especially the famous miso soup. Here, it brings the fresh taste of the ocean to this tofu soup as well as provide a good dose of iodine.Other healthy ingredients such as fresh carrot, leek, shiitake mushrooms and silken tofu makes this a hearty and healthy dish. The recipe uses chicken stock but you can replace it with vegetable stock if you want to make this a vegetarian soup dish. Make sure you choose a stock that is light and clear. Removing silken tofu from its box can be tricky. Score the sides of the plastic sheet top with a knife. Lift the sheet up. Cover the top of the box with a flat plate and invert. Press the bottom of the box gently to dislodge the tofu.