Shima Renkon
Nelumbo nucifera (Okinawan cultivar) | Okinawan Lotus Root
Botanical Description
Shima Renkon refers to Okinawan-grown varieties of lotus root, a rhizome of the sacred lotus plant. Grown in Okinawa’s warm, wet fields, this root is easily recognized by its beautiful cross-section of air channels, often forming a symmetrical wheel or flower pattern. It has a crisp texture when raw and becomes tender and slightly starchy when cooked.
Parts Used
Rhizome (root), occasionally leaves and seeds
Energetics
Taste: Slightly sweet, earthy, astringent
Temperature: Cooling
Affinity: Lungs, stomach, blood, digestion
Actions
Astringent, expectorant, anti-inflammatory, blood tonic, hemostatic, mucosal restorative
Traditional Uses
Eaten to clear heat and phlegm from the lungs and support respiratory health
Used in soups and pickles for digestive support and blood nourishment
Grated or juiced raw to soothe cough, nosebleeds, or hot conditions
Cooked renkon often appears in Okinawan longevity cuisine, valued for its texture and grounding quality
Said to promote circulation while also stopping excessive bleeding, a rare dual property in food medicine
Modern Applications
Rich in vitamin C, iron, dietary fiber, and antioxidants
Used for dry cough, diarrhea, and inflammatory gut conditions
Juice used in some herbal practices to reduce internal heat, bleeding, or ulcers
May support immune regulation and mucosal healing through its polysaccharide content
Contraindications
Raw juice is very cooling—avoid in cold constitutions or during acute chills
Some people may experience bloating or gas if undercooked
Always cook thoroughly unless juicing fresh for short-term use
Preparation Methods
Stir-fried or braised: In vinegar, miso, or soy-based sauces
Simmered in soups: A classic root vegetable in nimono (simmered dishes)
Pickled: In vinegar, often as part of a meal accompaniment
Juiced: Fresh for cough or nosebleed support (use with knowledge)
Dried slices: Sometimes added to broths as a tonic
Dose
As food: 3–5 slices cooked per meal
Juice: 1–2 tablespoons raw juice diluted with water, short-term use only
