We have many different types of soba noodles in Japan. They are very profound food.
You can choose hot or cold, Juwari soba, Nihachi soba which is made of a combination of 80% buckwheat and 20% flour, or Gowari soba (50% buckwheat)... and more.
100% buckwheat noodles called “Juwari Soba” are a great source for improving your digestive system as buckwheat sends Qi downward and aids your digestive system.
However, they are categorized as cooling food and I suggest avoiding cold Soba noodles if you have symptoms related to the cold. 

Yakuzen Classifications
Nature – Cool（涼）
Channels – Spleen (脾), Stomach (胃), Large intestine (大腸)
Flavor – Sweet (甘)

How does buckwheat help you?

1. Nourish the spleen and improve digestion
2. Send stomach Qi downward and eliminate food stagnation

Good for the following symptoms

1. Poor appetite due to indigestion
2. Heavy stomach
3. Bloating stomach
4. Burps
5. Nausea
6. Diarrhea
7. Excess vaginal discharge

Japanese home dishes with buckwheat

1. Kashiwa Soba (Hot soba noodles with chicken and leek)
   Benefits - Nourish Qi. / Promote Qi flow. / AId digestion. / Improve your appetite.
    

For more details, send me a message.

Cautions

It's very important to know about your body conditions before choosing foods.
Do not eat too much of particular foods at once.
Do not eat the foods you are allergic to.
There are foods to avoid if you are pregnant / have a disease. Ask your doctor before you start Yakuzen.