3 Kombucha Products at Costco Japan: Honest Comparison Guide [2026]
Share
3 Types of Kombucha Available at Costco Japan
As interest in gut health and fermented foods continues to grow, kombucha has become increasingly popular in Japan. Costco Japan currently stocks three different kombucha products, each with a unique format and flavor profile.
Here's a detailed comparison to help you choose the right one.
1. TEAZEN Kombucha Lemon (Powder Sticks)
Product Details
- Contents: 5g × 40 packets
- Price: Around ¥2,480 (as low as ¥1,980 on sale)
- Per serving: About ¥62
- Origin: South Korea
- Calories: Approximately 14 kcal per packet
What Makes It Stand Out
TEAZEN is a massively popular Korean kombucha brand that comes in convenient powder stick format. Simply dissolve one packet in 500ml of water for a lightly effervescent, refreshing drink.
It contains 12 types of lactic acid bacteria while being sugar-free and low-calorie. The 40-packet Costco pack works out to just ¥62 per serving, making it the best value option.
Taste
The lemon flavor has a pleasant balance of tartness and sweetness — reviewers describe it as "not too sour, easy to drink like juice" with roughly a 4:6 sour-to-sweet ratio. It dissolves quickly and has a subtle fizzy sensation.
Best For
- People who want portable, single-serve convenience
- Calorie-conscious drinkers
- Office workers and on-the-go lifestyles
- Budget-minded shoppers
2. Star Kombucha (Bottled)
Product Details
- Contents: 250ml × 12 bottles
- Flavors: Mango, Peach, Pomegranate, Passion Fruit (3 bottles each)
- Origin: Vietnam
- Fermentation: 30-day slow fermentation process
What Makes It Stand Out
Star Kombucha is a Vietnamese brand that's been growing rapidly since its 2019 launch. Each bottle is crafted using carefully selected ingredients and fermented slowly over 30 days. The variety pack includes four tropical fruit flavors, so you can try a different one each day.
Taste
Expect a refreshing tartness similar to a fruit vinegar drink. The initial sourness gives way to fruity sweetness. The mango flavor is particularly popular, with a distinctive tropical aroma and smooth finish.
Best For
- People who want authentic, ready-to-drink bottled kombucha
- Flavor variety seekers
- Those who prefer grab-and-go convenience
- Fans of fruity, tangy drinks
3. Kombucha Botanical (Supplement Capsules)
Product Details
- Contents: 120 capsules × 3 pouches
- Price: Around ¥3,298
- Brand: Infinity (Japanese manufacturer)
- Type: Capsule supplement
What Makes It Stand Out
Marketed as a "beauty supplement," Kombucha Botanical condenses kombucha's fermented extract into easy-to-swallow capsules. It's perfect for anyone who wants the benefits of kombucha without the taste. The resealable pouch design makes it easy to carry.
Best For
- People who don't enjoy kombucha's sour taste
- Supplement enthusiasts
- Those focused on beauty and skin health
Side-by-Side Comparison
| Feature | TEAZEN | Star Kombucha | Kombucha Botanical |
|---|---|---|---|
| Format | Powder sticks | Bottled drink | Capsule supplement |
| Price | ~¥2,480 | — | ~¥3,298 |
| Per day cost | ~¥62 | — | ~¥27 |
| Calories | 14 kcal/pkt | Varies | Minimal |
| Convenience | ◎ Add water | ◎ Ready to drink | ◎ Just swallow |
| Taste | Lemon | 4 fruit flavors | Tasteless |
| Portability | ◎ | △ | ◎ |
| Origin | South Korea | Vietnam | Japan |
What Is Kombucha?
Kombucha is a fermented tea beverage made by adding a SCOBY (Symbiotic Culture of Bacteria and Yeast) to sweetened tea. During fermentation, beneficial organic acids, enzymes, and probiotics are naturally produced.
In Japan, kombucha was known as "kōcha kinoko" (紅茶キノコ) and experienced a major health boom in the 1970s. It has recently made a comeback worldwide, driven by growing interest in gut health and probiotic-rich foods.
How to Choose the Right Kombucha
Match Your Lifestyle
Want daily convenience? Go with TEAZEN powder sticks. Prefer an authentic drink experience? Try Star Kombucha bottles. Can't stand sour drinks? Capsule supplements are your best bet.
Compare Value
Costco's bulk packaging makes all three options more affordable than drugstore or online alternatives. TEAZEN occasionally drops to ¥1,980 during Costco sales — worth watching for.
Consider Your Goal
For gut health support with probiotics, TEAZEN offers 12 strains of lactic acid bacteria. For enjoyable daily drinking, Star Kombucha delivers real fermented flavor. For a beauty-focused supplement routine, Kombucha Botanical fits seamlessly.
Frequently Asked Questions
When is the best time to drink kombucha?
There's no strict rule. You can enjoy it before meals, after meals, or after exercise — whenever fits your routine.
How much kombucha should I drink per day?
For bottled kombucha, around 200ml per day is a good guideline. For TEAZEN powder sticks, 1-2 packets daily is recommended. Start with a small amount and adjust based on how your body responds.
Is kombucha safe for children or pregnant women?
Some kombucha products contain trace amounts of caffeine. Children and pregnant women should start with small amounts or consult their doctor first.
How should I store kombucha?
Bottled kombucha should be refrigerated after opening and consumed before the expiration date. Powder sticks can be stored at room temperature away from direct sunlight.
Final Thoughts
Costco Japan offers three distinct ways to enjoy kombucha — powder, bottled, and supplement form. Each comes in Costco's signature bulk packaging for great value. Start with whichever format matches your lifestyle and taste preferences.
If you're interested in expanding your wellness routine beyond fermented drinks, consider the power of functional mushrooms too. Kinkatsudo's Lion's Mane Extract Capsules harness the benefits of medicinal mushrooms to support your daily health.