It was explained to me that this was called Ushiroda Special Udon in English. The special came from adding what the locals call edible wild plants from the mountains of Ushiroda, Japan. It was a delightful bowl of udon indeed.
@chanthasam , again, many thanks for the invite.
Thanks @stewsak for joining the food challenge. It sound very healthy and delicious. You got all the plants from the mountain to make this type of food. That is really amazing. I wish you to win this food challenge. Greeting from @chanthasam