Skip to product information
1 of 9

Q’SAI Co., Ltd.

The Kale: Premium Japanese Kale Powder for Daily Nutrition

The Kale: Premium Japanese Kale Powder for Daily Nutrition

100% pure domestic kale powder from Japan's leading aojiru producer. Each 7g serving delivers abundant calcium, vitamin K, and dietary fiber for bone health and digestive wellness.

Tracked shipping direct from Japan
Authentic product guarantee
Questions? We're here to help
Deliver to United States via Japan Post
Express: 4 - 7 days via EMS · Free from US$120
Standard: 10 - 14 days via ePacket Light · Free from US$60
Regular price $48.98 USD
Regular price Sale price $48.98 USD
Sale Sold out
Shipping calculated at checkout.
Supply
Quantity
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa
View full details

Key Takeaways

Pure Kale Formulation

100% domestic Japanese kale with zero additives, preservatives, or sweeteners. Each stick equals approximately 50g of fresh kale.

Convenient Daily Routine

Simply mix one 7g stick with 100-150ml of water, milk, or your preferred beverage. Dissolves quickly.

Quality Assured

Cultivated without agricultural chemicals or chemical fertilizers. Every batch undergoes residual pesticide testing.

Heritage Brand

Q'SAI has been producing premium aojiru for over 40 years, Japan's trusted name in kale supplements.

Best For

Those struggling to consume recommended daily vegetables or seeking natural bone health support without synthetic additives.

Nutritional Powerhouse

Kale outperforms barley grass in calcium (1942.8mg vs 293.0mg per 100g), magnesium, and vitamin E content.

Why It Works

Benefits

The Kale delivers concentrated nutrition from Japan's most trusted green vegetable source.

1

Support Bone Health Naturally

The Kale provides 126mg of calcium and 150ug of vitamin K per serving. Vitamin K activates proteins essential for calcium binding in bone tissue, working synergistically to support bone density maintenance.

Nutritional Functional Food (Vitamin K)
2

Promote Digestive Regularity

Each 7g serving contains 2.7g of dietary fiber, supporting healthy bowel movements and nurturing beneficial gut bacteria. Many users report improved regularity within the first week.

Research-backed whole-food nutrition
3

Comprehensive Antioxidant Protection

Rich in beta-carotene, vitamin C (14mg per serving), and vitamin E, The Kale provides broad-spectrum antioxidant support against cellular damage from daily environmental stressors.

Whole-food antioxidants
4

Fill Nutritional Gaps Conveniently

One stick delivers nutrition comparable to 114g of milk (calcium), 6.2 bell peppers (beta-carotene), and 2.7 celery stalks (fiber). Concentrated nutrition for busy lifestyles.

Verified nutritional content

The Science

How It Works

Understanding how The Kale delivers concentrated nutrition to your body.

Freeze-Crushing Preservation Technology

Freeze-Crushing Preservation Technology

Q'SAI uses specialized freeze-crushing and micro-pulverization manufacturing processes that preserve heat-sensitive vitamins while creating ultra-fine particles.

Key benefits:
  • Maximum nutrient retention vs standard drying
  • Quick dissolution in liquid
  • Efficient absorption into your system
Vitamin K and Calcium Synergy

Vitamin K and Calcium Synergy

Vitamin K (150ug per serving) activates osteocalcin, a protein essential for calcium binding in bone tissue.

This works synergistically with calcium (126mg per serving) to support bone density maintenance and cardiovascular health.
Superior Kale Cultivation

Superior Kale Cultivation

Open-field cultivation without agricultural chemicals allows kale to develop maximum nutritional density.

Compared to barley grass (per 100g):
  • Calcium: 1942.8mg vs 293.0mg
  • Magnesium: 228.5mg vs 88.8mg
  • Vitamin E: 11.4mg vs 6.8mg

The Science

Research & Evidence

What makes kale a nutritional powerhouse and how Q'SAI ensures quality.

Nutritional Comparison: Kale vs Barley Grass

Nutritional Comparison: Kale vs Barley Grass—Q'SAI research demonstrates kale's nutritional superiority with significantly higher calcium (1942.8mg vs 293.0mg), magnesium (228.5mg vs 88.8mg), and vitamin E (11.4mg vs 6.8mg) per 100g.

Nutritional Equivalents Per Serving

Nutritional Equivalents Per Serving—Each 7g stick provides nutrition equivalent to 114g milk (calcium), 2.7 celery stalks (fiber), 6.2 bell peppers (beta-carotene), and 125 tbsp sesame (vitamin E).

A Note on Evidence: We present research on ingredients, not specific product claims. Individual results may vary. This supplement is not intended to diagnose, treat, cure, or prevent any disease.

Ingredient Research Highlights

KALE (BRASSICA OLERACEA)

Kale is recognized as a nutrient-dense superfood containing high concentrations of vitamins, minerals, and antioxidants. Particularly valued for vitamin K content supporting bone health and blood clotting functions.

Japanese Food Composition Tables; Nutritional science research
VITAMIN K

Vitamin K is essential for activating proteins involved in bone mineralization and blood clotting. Research indicates adequate intake supports bone density maintenance. Q'SAI's Kale is classified as a Nutritional Functional Food for Vitamin K.

Nutritional function food designation requirements
DIETARY FIBER

Dietary fiber promotes healthy digestive function by supporting regular bowel movements and providing substrate for beneficial gut bacteria. Adequate intake is associated with improved digestive comfort.

Nutritional research on dietary fiber

About Brand Story

Q’SAI Co., Ltd.

Q'SAI Co., Ltd. — founded in 1965 in Fukuoka — pioneered Japan's kale aojiru (green juice) market after founder Hasegawa Tsuneo recovered from illness using kale juice in 1978. The company name derives from "Kyushu Shizen Yasai Kumiai" (Kyushu Natural Vegetable Association). Their iconic TV commercial catchphrase "Mazu~i, mou ippai!" ("Tastes bad — one more glass!") sparked Japan's aojiru boom.

Now positioning itself as a "Well-Aging Company," Q'SAI has expanded beyond its flagship kale products into healthcare supplements and skincare, including the popular Colarich all-in-one beauty gel. All kale is grown without chemical pesticides at their dedicated farm in Shimane Prefecture.

Our Curation Process

Why We Selected This Product

Every product at Naturacare undergoes rigorous evaluation before joining our collection.

純粋

Purity

100% pure domestic kale with absolutely no additives, preservatives, colorants, or sweeteners. What you see is what you get - nothing but concentrated kale nutrition in every stick.

伝統

Heritage & Tradition

Q'SAI has dedicated over 40 years to perfecting kale cultivation and processing. This isn't a trend-chasing product - it's the culmination of decades of Japanese agricultural expertise.

透明性

Transparency

Complete traceability from farm to package. Q'SAI maintains control over cultivation through their own farms and contracted domestic growers, with rigorous pesticide testing on every batch.

Our Promise: We don't just import popular Japanese supplements - we investigate each product's formulation, manufacturing standards, and real-world reputation in Japan.

We selected The Kale because it represents the gold standard in Japanese green nutrition. Q'SAI's uncompromising commitment to purity and quality aligns perfectly with our mission.

Why Japan

The Japanese Advantage

Japan's supplement industry operates under some of the world's strictest quality standards. Combined with a cultural dedication to craftsmanship and centuries of wellness traditions, Japanese supplements represent a level of quality that's difficult to find elsewhere.

Rigorous Quality Standards

Japanese regulations require comprehensive testing at every stage of production, with standards that often exceed international requirements.

GMP-Certified Manufacturing

All our products come from facilities that meet Japan's strict GMP (Good Manufacturing Practice) certification requirements.

Centuries of Tradition

Many Japanese supplements draw on ingredients and formulations refined over generations, combining ancient wisdom with modern science.

Transparent Sourcing

Japanese manufacturers maintain complete traceability, so you know exactly where every ingredient comes from.

Directions

How to Use

Simple daily routine for optimal results.

Pour 100-150ml of water, milk, or your preferred beverage into a glass or cup. Add one stick pack (7g) of The Kale powder to the liquid.

Stir thoroughly with a spoon or shaker until completely dissolved, approximately 15-20 seconds.

Recommended daily intake is 1-2 stick packs for optimal nutritional supplementation. First-time users should start with one stick daily and gradually increase based on individual tolerance.

Tips for Best Results

  • Consume immediately after mixing for best flavor and nutritional value
  • Do not prepare in advance or store mixed beverages
  • Can be mixed with yogurt, apple juice, or smoothies for variety
  • Use a shaker bottle for smoother consistency
  • Store sticks in a cool, dry place away from direct sunlight
  • Open individual stick packs and consume entirely - do not store partial servings

What's Inside

Ingredients

Single-ingredient purity - 100% pure domestic kale.

150ug

Vitamin K

Supports bone health and blood clotting functions

126mg

Calcium

Essential mineral for bone density maintenance

2.7g

Dietary Fiber

Promotes healthy digestion and gut bacteria

Ingredients: Kale (domestically produced in Japan)

Allergen Information: Contains: None of the specified allergens. Free from: Dairy, eggs, wheat, peanuts, shrimp, crab, buckwheat, tree nuts, soybeans, fish.

Important Information

Safety & Precautions

Please read before use.

Anticoagulant Medication (CRITICAL)

DO NOT use if taking Warfarin (Coumadin) or other anticoagulant medications. This product contains high levels of vitamin K (150ug per serving) which interferes with blood-thinning medication effectiveness.

Allergies

Check the ingredient list if you have food allergies. This product contains only kale but is not recommended for individuals with allergies to cruciferous vegetables.

Medical Conditions

Individuals with kidney disease or potassium restrictions should consult their physician before consumption. Those taking prescription medications should seek doctor's approval before starting.

Pregnancy & Nursing

Pregnant and nursing women should consult healthcare providers before regular use, although the product is generally considered safe.

Dosage

Recommended 1-2 sticks per day. First-time users should start with smaller amounts and gradually increase. Do not exceed recommended daily intake.

Storage

Keep in a cool, dry place away from direct sunlight, high temperatures, and humidity. Keep out of reach of children under 3 years. Consume individual stick pack immediately after opening.

Details

Product Specifications

Product Name
The Kale | Vegetable Supplement | 30 Sticks
Brand
Q'SAI Co., Ltd.
Contents
210g (30 stick packs x 7g each)
Serving Size
1 stick pack (7g)
Servings Per Container
30 servings
Net Weight
210g
Form
Powder (stick pack)
Country of Origin
Japan
Manufacturing
Nutritional Functional Food (Vitamin K)

Questions

Frequently Asked Questions

Kale powder is an excellent source of essential nutrients including calcium, vitamin K, dietary fiber, and antioxidants. It supports bone health through its vitamin K and calcium content, promotes digestive regularity with natural fiber, and provides broad-spectrum nutritional supplementation.

The Kale delivers these benefits in a convenient, easy-to-use format.
Yes, The Kale is designed for daily use. Q'SAI recommends 1-2 stick packs per day as a nutritional supplement.

First-time users should start with one stick and gradually increase. However, those taking blood-thinning medications like Warfarin should avoid this product due to its vitamin K content.
Mix one 7g stick with 100-150ml of water, milk, or your preferred beverage. Stir thoroughly or use a shaker bottle until completely dissolved.

Consume immediately after mixing - do not prepare in advance. For variety, add to yogurt, smoothies, or apple juice. Consistency is key for optimal results.
Q'SAI's freeze-crushing and micro-pulverization processes preserve heat-sensitive vitamins while concentrating nutrients. One 7g stick contains nutrition equivalent to approximately 50g of fresh kale.

The dried powder format offers more consistent nutrient delivery than fresh kale, which can vary in quality.
Kale outperforms barley grass in key nutrients: calcium (1942.8mg vs 293.0mg per 100g), magnesium (228.5mg vs 88.8mg), and vitamin E (11.4mg vs 6.8mg).

The Kale's single-ingredient purity means no fillers or additives - just concentrated kale nutrition from 40+ years of Japanese expertise.
The Kale is safe for children over 3 years old. Recommended dosage is one-third to one-half of adult serving based on body weight.

Start gradually and monitor tolerance. Consult a pediatrician for children under 3. Keep out of reach of young children.
No negative interaction exists between kale and iron supplements. The vitamin C content (14mg per serving) actually enhances non-heme iron absorption from plant sources.

Taking them together may improve overall iron uptake effectiveness.
Most users report improved digestive regularity within one to two weeks. Bone health and immune support benefits accumulate over consistent three-month usage.

Individual results vary based on overall diet and lifestyle factors. Consistency is more important than any single dose.
Yes, The Kale dissolves well in warm liquids up to 60C. However, extremely hot beverages may reduce vitamin C content.

Room temperature or moderately warm drinks preserve maximum nutritional value while maintaining pleasant taste.
Naturacare offers The Kale from Q'SAI, Japan's premier aojiru brand with over 40 years of expertise. We source directly to ensure authenticity and freshness.

Look for products specifying 100% domestic Japanese kale and pesticide-free cultivation for highest quality.
  • 5 stars: 18 (38%)
  • 4 stars: 26 (55%)
  • 3 stars: 3 (6%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
B
Beatrice Fontaine
Smooth drinking, easy routine

The finely milled powder mixes cleanly into water with barely any grittiness. The kale odor is noticeably milder than other brands I've used. Because drinking it isn't a chore, it's simple to maintain as a daily habit.

S
Soo Min Choi
Earthy, comforting flavor

Mellow and slightly earthy — easy to sip on. The shaker is compact and sized for a single sachet which helps keep the concentration consistent. A great way to fill the vegetable gap when meals lean heavy on starch and protein.

T
Thomas Andersen
Pairs nicely with milk

Soft and mellow whether mixed with water or milk. The included shaker is a thoughtful addition. A reliable daily green drink I look forward to.

L
Luciana Vargas
First timer — better than expected

The individual portions and bundled shaker remove all the guesswork about how much to use. You can always see how many sachets are left at a glance. I was honestly nervous about my first green drink, but with chilled milk it was far better than I imagined. Looking forward to trying it with honey and other mix-ins.

R
Rina Watanabe
Too many shakers accumulating

Every order includes a shaker bottle but I've got a whole collection by now. It seems wasteful. That said, the kale powder itself is top-notch.

H
Henrik Johansson
Odor becomes overwhelming with milk

When you mix it with milk instead of water the aroma intensifies quite a bit. If the packaging suggests milk as a mixer, perhaps the formulation could be tweaked to account for that.

M
Michiko Saito
A decade of green juice and counting

I've been on kale green juice for a full decade and I'm committed to kale — not barley grass. This is a deep, intense green juice. No sweeteners, just the honest taste of kale. The individual sticks keep things sanitary and travel-friendly.

C
Chiara Moretti
Nothing but kale — perfect

I appreciate that the ingredient list is just kale and nothing else. Each sachet is quite large so I stir half into my morning smoothie and save the rest with a clip. Much better deal than the smaller packets.

L
Leila Ahmadi
The shaker changes everything

Before I had a shaker I always ended up with clumps at the bottom. The included one has measurement lines printed on it and the pre-portioned sachets mean every glass turns out uniform. Slightly powdery mouthfeel but overall very easy to consume.

N
Nikolai Petrov
No bitterness at all

Dusted some onto cottage cheese first — totally fine, zero bitterness. Then dissolved it in water — equally smooth. Tastes like chilled matcha. This is genuinely something I can maintain long-term.

M
Min Jun Park
Naturally sweet in almond milk

Shook it up with unsweetened almond milk and it tasted naturally sweet — hard to believe it's just kale. Perfect for those mornings when eating isn't an option yet. Also goes well mixed into unflavored whey protein.

K
Keiko Morimoto
Mixes without any fuss

Blends into water smoothly and has a mild enough taste that drinking it daily feels effortless.

A
Anders Lindqvist
Reliable brand, consistent quality

A brand I trust so I feel comfortable making it part of my daily routine. The included shaker simplifies preparation. There's a mild leafy taste but nothing that would put you off.

L
Liam O'Brien
Versatile mixer

There's a detectable kale flavor in plain water, but it mellows right out in oat milk or rice milk. No lumps at all when using the shaker. Would like to keep this up.

M
Marek Kowalski
Practical and nutritious

Pure kale in convenient single-serve sticks — 30 in a box. The shaker that comes with it has volume lines marked and seals tightly. The powder is ultra-fine and disappears into water almost instantly. The flavor is lightly vegetal with a subtle matcha-like undertone. Not gourmet, but perfectly drinkable as a daily habit. I actually prefer it blended with milk. The shaker is a welcome extra.

M
Miho Nakagawa
Decent product overall

Nice taste and generous amount in each box. I wish it were slightly more affordable, but I'm planning to reorder regardless.

S
Stefan Mueller
Reminds me of broccoli, actually

Even though it's 100% kale I expected something intense, but it actually tastes like mild broccoli — and I mean that as a compliment. Would be lovely stirred into stews as well. I always thought of Kyusai as the brand behind those 'disgusting drink' commercials, but apparently they've been using exclusively domestic kale all along. Respect.

C
Celine Marchand
Considering a subscription

First time trying a kale supplement and I was pleasantly surprised by how drinkable it is. Seriously thinking about signing up for regular deliveries.

T
Tatiana Sokolova
Slightly clumpy but drinkable

It takes a bit more shaking to fully dissolve but the taste is perfectly acceptable. No complaints there.

R
Rafael Dominguez
A solid morning boost

Every day I blend this into my pea protein shake and my stomach has never been happier. Results may vary from person to person, but my digestion now runs like clockwork. Definitely worth a shot!

P
Patricia Herrera
Much better than its reputation

Everyone remembers those old commercials about how awful it tastes, but honestly this is completely fine to drink. There's a faint grassy note but it goes down easily. Think of it as a thin, lightly earthy tea with a whisper of natural sweetness. Blended with fruit juice it thickens slightly but never feels grainy. At roughly 220 yen per serving it's excellent value.

C
Charlotte Brown
Impressive expiration date

Ordered in midsummer and the expiration date was well over a year out. Speaks well of their quality control.

A
Astrid Eriksson
Reasonable texture, fair price

The box is sizable but each stick is individually sealed which makes it a little bulky in the pantry. Easy to portion with the shaker and dissolves well with minimal froth. Neutral green flavor — neither exciting nor off-putting — fine if you're not bothered by vegetal tastes.

O
Oliver Byrne
Gentler than anticipated

I braced myself for strong bitterness given that it's pure kale. The more vigorously you shake it, the smoother it becomes. Works equally well in water or milk — milk rounds it off even further. Not extraordinary, but certainly not unpleasant. There's also something satisfying about knowing you're putting something healthy into your body.

D
Dmitri Volkov
Shaker solves the clumping problem

Green drinks like this tend to clump and that can kill motivation fast. Having a shaker bundled in solves that entirely — it dissolves perfectly. The flavor is reminiscent of a strong green tea — perfectly fine.

I
Ingrid Larsson
Genuinely impressed

This lives up to the Kyusai reputation. Just as handy and flavorful as their frozen line. The authentic kale taste really comes through and I appreciate that.

Y
Yuna Baek
Mix and go in no time

The shaker blends it in seconds and the single-serve sticks are perfect for throwing in a bag.

K
Kofi Mensah
A nostalgic flavor

I used to drink this brand a long time ago — tasting it again brought back fond memories.

A
Amara Osei
Works well with juice

Blended into carrot-based vegetable juice, any bitterness practically vanishes. It does get a little thick so I top it off with extra water. The bundled shaker prevents any lumps from forming. I did slightly prefer another brand's sweeter taste, but this one holds its own very well.

W
Wei Chen
A nice daily addition

Pleasant flavor and it makes me feel like I'm making a healthy choice.

A
Alina Kovalenko
Chemical-free and light

Pure domestic kale in powdered form — whip it up in the shaker, catch a brief grassy whiff close up, then enjoy how light and clean it drinks. Not something you'd call tasty exactly, but it's the kind of wholesome drink that becomes a daily anchor.