Pumpkin, a warming vegetable harvested in autumn, actually supports our bodies even during the hot summer months.
It helps warm up and strengthen your stomach that may have been chilled by excessive consumption of cold drinks, raw vegetables, or air conditioning. 
Since it replenishes Qi, it helps with chronic fatigue recovery and boosts the immune system.

Also, pumpkin seed has been used in Chinese medicine for expelling parasites in the intestines.

Nature – Warm （温）
Channels – Spleen (脾), Stomach (胃)
Flavor – Sweet (甘)

How does pumpkin help you?

1. Replenish Qi
2. Strengthen your spleen

Good for the following symptoms

1. Fatigue caused by a weak stomach
2. Nausea
3. Cold-related stomach pain
4. Constipation
5. Chronic fatigue

Japanese home dishes with pumpkins

1. Itokoni (Simmered pumkin with Adzuki bean soup)

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.