Rehydrate dried Shiitake overnight. (Leave 100ml of the water used to soak the Shiitake for later use). Quarter the Shiitake, cut off the hard part of the stem, and tear into thin slices.
Wash the daikon radish, carrot, and burdock root well and coarsely cut without peeling the skin. (Soak the burdock root in water for about 30 seconds)
Slice the lotus root into 1 cm thick pieces without peeling the skin and cut them into half. (Soak them in water for about 30 seconds.) Peel off the taro skin.
Tear apart the konnyaku into small pieces. Sprinkle on a pinch of salt and rub in. Then, cook in boiling water for 2 to 3 minutes and drain.
Add sesame oil to a pot and heat up. Then, add the dried Shiitake and stir fry for about 3 minutes.
Once fragrant, add the burdock root and lotus root and stir-fry well.
Close the lid and simmer on low heat until the burdock root becomes fragrant and stir fry for about 3 minutes.
Turn the heat up to medium and add the daikon radish and carrots. Stir fry for another 2–3 minutes.
Add soy sauce and close the lid, then turn the heat down to very low and broil for about 5 minutes. The vegetable will release liquid.
Add the vegetable broth and water used to soak the Shiitake and simmer at medium heat. Once the vegetables are soft, skim off the scum from the surface and turn off the stove. Add some water in between to adjust the amount of liquid.
At the same time, boil the taro and the pinch of rice in a separate pot with enough water to cover all the taro. Once it becomes soft enough to let a skewer through, drain the water and cut the taro into quarters.
Add the taro to the pot in 10. and cover with the lid without turning on the stove. Let it sit for around 6 hours to get a well-rounded soup.
Wrap the tofu in kitchen paper, place something flat and heavy like a plate on top of it for 30 minutes to 1 hour. Pour hot water over the Aburaage and cut them into 2 cm strips.
Heat up the soup that was set aside. If it tastes too bland, add a pinch of salt, and some cooking wine if you want more Umami flavor.
Once it comes to a boil, add the fried tofu skin, tofu, and komatsuna spinach cut into 3cm length. Cover with lid and turn off the stove.
Once the tofu is heated up with the residual heat, it is ready to serve.