Pillbox Japan Inc.

Onaka: Japan's #1 Fat Burning Supplement for Visceral & Subcutaneous Belly Fat

Japan diet pill containing kudzu flower-derived isoflavones (tectrigenins) that help reduce visceral fat, subcutaneous fat, and waist circumference. Registered as Foods with Function Claims in Japan.

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Triple-Action Fat Metabolism

Kudzu flower-derived isoflavones work through three mechanisms - suppressing fat synthesis, promoting fat breakdown, and accelerating fat burning in brown adipocytes.

Clinically Validated Results

Research on adults aged 25-65 demonstrated average abdominal fat reduction of 20cm², plus 1kg weight loss and 0.8cm waist reduction over 12 weeks.

Japan's #1 Fat Burning Supplement

Won the top position for 7 consecutive months in Japan, trusted by Japanese consumers for reducing stubborn belly fat.

Foods with Function Claims

Officially registered with Japan's Consumer Affairs Agency (B84) as a functional food with scientifically-backed health claims.

Stimulant-Free & Safe

Contains no caffeine or stimulants. Clinical trials showed no serious adverse effects when taken as directed.

Convenient Daily Use

Just 4 small tablets once daily with water. Compact pouch design for easy carrying.

People who want to reduce stubborn belly fat safely and naturally

Those with high BMI (25+) seeking clinically-proven abdominal fat reduction

Individuals concerned about visceral fat and waist circumference measurements

Adults aged 25-65 looking for Japan's #1 fat metabolism supplement

Post-diet maintainers looking to prevent weight regain and metabolic slowdown

Health-conscious individuals prioritizing pharmaceutical-grade Japanese quality over Western diet pills

Those who've tried other supplements without measurable results on belly fat

Busy professionals needing convenient, stimulant-free metabolism support throughout the day

1

Targets Both Visceral and Subcutaneous Fat

Onaka's kudzu flower isoflavones take a dual approach, targeting both visceral fat (around organs) and subcutaneous fat (under skin). Unlike supplements that only address water weight, Onaka works on actual belly fat stores through scientifically-validated mechanisms.

Foods with Function Claims

2

Suppresses New Fat Formation

When your body has excess energy from food, your liver converts it into triglycerides that get stored as body fat. Kudzu flower isoflavones intervene in this process, reducing triglyceride synthesis so less incoming energy becomes stored fat.

Mechanism research-backed

3

Activates Existing Fat Breakdown

The isoflavones stimulate white adipocytes (fat storage cells) to break down existing stored fat into fatty acids that can be mobilized and used for energy. This helps your body access stubborn fat stores.

Clinically studied ingredient

4

Accelerates Fat Burning

Once broken down, fatty acids are transported to brown adipocytes, where kudzu flower isoflavones enhance mitochondrial activity to burn fat more efficiently as fuel.

Clinical research validated

Suppress the synthesis of fat

The excess energy that cannot be burned is synthesized into triglyceride by the liver work, and is accumulated as body fat in each part of the body.

"Kuzu flower-derived isoflavones" are proved to suppress the synthesis of triglycerides.

Promote the breakdown of fat

The fat accumulated in the body cannot be consumed as energy as it is, so it is decomposed into fatty acids.

"Kuzu flower-derived isoflavones" break down fat in white adipocytes.

Promote fat burning

Body fat protection, which has been decomposed to become fat-proof, is burned in the color adipocytes.

"Kuzu flower-derived isoflavones" supports the function of these brown fat-proof cells and promote fat burning.

Abdominal Fat Reduction Study—Clinical study showed 20cm² reduction in abdominal fat area after 12 weeks, with 16cm² reduction at 8-week mark. Study included adults aged 20-65 with BMI 25-30.

Weight and Waist Reduction—Study participants experienced 1kg weight reduction and 0.8cm waist circumference reduction compared to control group over 12 weeks.

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.

Clinical Research Highlights

Kudzu Flower Isoflavones (Tectrigenins)

Research demonstrated that 35mg daily intake of kudzu flower-derived isoflavones resulted in measurable reductions in visceral fat, subcutaneous fat, body weight, and waist circumference over 12 weeks.

Research review submitted to Consumer Affairs Agency (B84)

Study Conditions

Results achieved with approximately 1900 kcal daily intake and 9000 steps of daily activity. Study participants had BMI 25-30, aged 20-65.

Clinical trial methodology

Consumer Validation

Onaka achieved #1 position in Japan for 7 consecutive months for abdominal fat reduction supplements, reflecting Japanese consumer trust.

Market data

The Story

About Brand Story

Pillbox Japan Inc.

Pillbox Japan is driven by a mission to solve specific health concerns through scientifically verified "Foods with Function Claims." We prioritize efficacy, meticulously selecting ingredients backed by clinical data to create unique, high-performing supplements.

Commitment to safety is paramount. All our products are manufactured in domestic GMP-certified factories under strict quality controls. We deliver reliable, evidence-based solutions that fit effortlessly into your lifestyle, ensuring peace of mind with every dose.

機能性

Functional Evidence

Registered as Foods with Function Claims (B84) with Japan's Consumer Affairs Agency, backed by clinical research demonstrating measurable reductions in visceral fat, subcutaneous fat, and waist circumference.

実績

Proven Track Record

#1 in Japan for 7 consecutive months. This reflects real consumer validation in one of the world's most discerning supplement markets.

安全性

Safety First

Stimulant-free, caffeine-free formula with no serious adverse effects reported in clinical trials. Manufactured under strict Japanese pharmaceutical-grade quality control standards.

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 Onaka because it represents what Japanese supplement innovation does best: identify a specific health concern (stubborn belly fat), develop a targeted botanical solution (kudzu flower isoflavones), validate it through clinical research, and register it with regulatory authorities.

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.

Learn more

Take 4 tablets once daily with a full glass of water or other beverage.

Swallow tablets whole without chewing for optimal absorption of active ingredients.

Take at a consistent time each day (morning or evening) to maintain steady metabolic support.

Use continuously for at least 8-12 weeks to experience measurable fat reduction results.

Do not exceed 4 tablets per day; follow recommended dosage for safety and efficacy.

Best Practices: Take with a meal to enhance absorption and minimize any potential mild digestive adjustment during the first few days of use.

Expected period to see the effects: It depends on individuals. Generally people would see the result of lost weight in 2 months.

Tips for Best Results

Take with a meal to enhance absorption
Maintain consistent daily intake at the same time each day
Combine with a balanced diet (approximately 1900 kcal/day based on clinical study conditions)
Stay moderately active (approximately 9000 steps/day based on clinical study conditions)
Allow 8 weeks for initial results, 12 weeks for optimal fat reduction
Store in a cool, dry place away from direct sunlight and high humidity

35mg

Kudzu Flower Isoflavones (Tectrigenins)

The clinically-studied functional ingredient per daily serving

Flower Extract

Not Root

Derived from kudzu flowers (kuzunohana), not the root used in traditional medicine

Allergen-Free

Clean Formula

Free from all major allergens including gluten, dairy, soy, eggs, nuts

Ingredients: Reduced palatinose, kudzu flower extract (containing tectrigenin isoflavones), cellulose, sucrose fatty acid ester, silicon dioxide. Active Functional Ingredient: Kudzu flower-derived isoflavones (as tectrigenins) - the clinically-studied compound responsible for fat metabolism effects.

Allergen Information: Contains: None of the major allergens. Free from: Gluten, dairy, soy, eggs, fish, shellfish, tree nuts, peanuts, wheat, artificial colors, artificial preservatives, GMO ingredients. Note: Kudzu is a leguminous plant distributed from Japan to China and East Asia. The extract is derived specifically from the beautiful magenta flowers (kuzunohana) that bloom from summer to autumn, not from the root typically used in traditional medicine.

Pregnancy & Nursing

If you are pregnant or lactating, please consult your doctor before use as effects during pregnancy have not been established.

Medications

If you are taking prescription medications, consult your healthcare provider to check for potential interactions, especially with diabetes or thyroid medications.

Allergies

If you have food allergies, please check the ingredient list carefully before consuming.

Discontinue Use

Discontinue use if you experience any adverse reactions (digestive discomfort, skin rash, headaches) and consult a healthcare professional. In rare cases, this product may not suit your constitution or physical condition - if you feel unwell, stop use immediately.

Dosage

Please follow the recommended daily dose of 4 tablets and be careful not to exceed this amount.

Storage

Store in a cool place away from direct sunlight and hot, humid environments to maintain product quality.

Disclaimer

This product has been notified to the Commissioner of the Consumer Affairs Agency as Foods with Function Claims at the responsibility of the business operator. However, unlike Foods for Specified Health Uses, it has not been individually examined by the Consumer Affairs Agency. This product is not intended for diagnosis, treatment, cure, or prevention of diseases. Balance your diet based on staple foods, main dishes, and side dishes for comprehensive health. Clinical trials showed no serious adverse effects when taken as directed.

Product Name

Fat Burning Supplements | Onaka 60 tablets

Brand

Pillbox Japan Inc.

Contents

60 tablets

Serving Size

4 tablets per day

Servings Per Container

15-day supply

Net Weight

46g per package

Form

Standard tablet (swallow whole, do not chew)

Country of Origin

Japan

Manufacturing

Manufactured under strict Japanese pharmaceutical-grade quality control standards

Is Onaka safe? What are the actual side effects I should be concerned about?

Onaka meets Japan's pharmaceutical-grade standards and uses safe kudzu flower extract. Some may experience mild digestive changes at first, but it's caffeine-free and non-stimulant. Consult your doctor if pregnant or taking medication.

How long does it take to see results, and what kind of results can I expect?

Most users feel more energy within 2-4 weeks, see waist reduction around 8 weeks, and achieve best fat loss after 12 weeks. Results vary, but combining Onaka with balanced diet and exercise maximizes effectiveness.

Why did Onaka become #1 in Japan for 7 consecutive months?

Onaka stands out in Japan for targeting visceral fat, a key health concern linked to metabolic risks. Clinically proven, stimulant-free, and government-registered, it safely supports fat metabolism in three stages under Japan's strict manufacturing standards.

How is Onaka different from other fat-burning supplements?

Onaka's kudzu flower isoflavones naturally regulate fat metabolism without stimulants or diuretics. It targets visceral and subcutaneous belly fat, not water weight, and is clinically proven and officially registered as a Japanese Foods with Function Claims product.

Do I need to diet or exercise while taking Onaka?

Onaka enhances your natural fat metabolism but works best with balanced habits. Maintain normal eating with protein and vegetables, limit sugar, stay hydrated, and move at least 30 minutes daily - walking is enough to boost results.

Can I take Onaka with other supplements or medications?

Onaka is safe with basic supplements like vitamins, omega-3s, and collagen but shouldn't be mixed with other fat-burning products. Consult your doctor if on medication, and take it at least two hours apart from prescriptions.

Will the fat come back after I stop taking Onaka?

Onaka boosts metabolism while you take it, but lasting results come from healthy habits built during use. Many continue with a lower maintenance dose or cycle usage, pairing it with balanced eating and regular activity.

Why is kudzu flower extract special for fat loss?

Kudzu flower (Pueraria lobata) is rich in rare isoflavones that regulate fat metabolism. They reduce triglyceride synthesis, activate fat breakdown, and boost energy burning in brown fat cells, offering a natural, triple-action metabolic effect.

What is the history of kudzu flower in Asian wellness traditions?

Kudzu flower has been used in Asian wellness for centuries. In China, it's one of the "five flowers" in traditional Five Flower Tea, consumed by people of all ages for health.

The famous Japanese historical figure Mito Komon was known to have consumed kudzu flower regularly. While the root is commonly used in traditional medicine, recent research discovered the flower contains unique isoflavones with fat metabolism benefits.

How does Onaka target belly fat specifically?

Onaka contains kudzu flower-derived isoflavones (tectrigenins) that work through three mechanisms targeting abdominal fat:

First, they suppress triglyceride synthesis in the liver to prevent new fat storage. Second, they promote breakdown of existing fat in white adipocytes. Third, they enhance fat burning in brown adipocytes.

This triple-action approach specifically addresses both visceral fat (around organs) and subcutaneous fat (under skin).

Onaka: Japan's #1 Fat Burning Supplement for Visceral & Subcutaneous Belly Fat