1. Put the daikon, konnyaku, and 4 hard-boiled eggs (peeled) in the donabe or pot. Bring it to a boil.
2. Once boiling, reduce the heat to low or medium low to maintain a simmer. Cook, uncovered, for 20 minutes.
3. Meanwhile, cut the big pieces of fish cakes in the oden set in half or quarters so they are a convenient size to pick up with chopsticks. Here, I cut the larger Satsuma age (round fried fish cakes) into quarters and the chikuwa (baked fish cakes) diagonally in half.
4. I cut the gobo-maki (burdock fish cake rolls) and fish balls in half.
5. I cut the medium-sized Satsuma age in half. I cut the pieces of 1 package deep-fried firm tofu cutlet (atsuage) in half crosswise and then cut each piece in half again diagonally.
6. For the small fish balls, you can thread two pieces onto a skewer to keep them together. Diagonally cut 1 package hanpen (fish cake) in quarters.
7. After 20 minutes, check your oden pot. If there‘s so much broth that your oden pot will overflow when you add the oden set and other fish cakes, transfer some broth to a measuring cup (or bowl) and set aside. You can add this reserved broth to the pot later, as needed.
8. Now, add the oden set, other fish cakes (except for the hanpen), atsuage, and 4 pieces dried knotted kombu to the pot. Cook for 10 minutes.
9. After 10 minutes, add the hanpen and the mochi kinchaku (optional). Cook for 3 minutes. Now, your oden is ready to serve. Alternatively, you can turn off the heat and let it cool on the countertop. Tip: Just like other Japanese simmered foods (nimono), letting oden cool in the broth allows the flavors of the savory dashi to soak into the ingredients.