--- product_id: 312773928 title: "Kawashimaya Natto Starter Powder 3g (0.1oz), To Make 10-30kg of Homemade Natto, Bacillus Subtilis From Soybean Extract" brand: "kawashimaya" price: "€ 27.49" currency: EUR in_stock: true reviews_count: 13 category: "Kawashimaya" url: https://www.desertcart.hr/products/312773928-kawashimaya-natto-starter-powder-3g-0-1oz-to-make-10 store_origin: HR region: Croatia --- # 1×10¹⁰ CFU/g potent probiotic culture Resealable pouch for fresh storage 3g starter makes 10-30kg natto Kawashimaya Natto Starter Powder 3g (0.1oz), To Make 10-30kg of Homemade Natto, Bacillus Subtilis From Soybean Extract **Brand:** kawashimaya **Price:** € 27.49 **Availability:** ✅ In Stock ## Summary > 🧬 Unlock the ancient Japanese superfood magic—make your own probiotic powerhouse at home! ## Quick Answers - **What is this?** Kawashimaya Natto Starter Powder 3g (0.1oz), To Make 10-30kg of Homemade Natto, Bacillus Subtilis From Soybean Extract by kawashimaya - **How much does it cost?** € 27.49 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/312773928-kawashimaya-natto-starter-powder-3g-0-1oz-to-make-10) ## Best For - kawashimaya enthusiasts ## Why This Product - Trusted kawashimaya brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Freshness Locked In:** Resealable, zip-lock pouch keeps your starter spores viable longer—store refrigerated for peak performance. - • **Economical Batch Yield:** Just 3 grams of starter transforms up to 30 kilograms of soybeans into nutrient-dense natto—perfect for home chefs and pros alike. - • **Risk-Free Natto Journey:** We back your fermentation adventure with a 100% satisfaction guarantee or your money back—because your gut health deserves the best. - • **Effortless Natto Mastery:** Step-by-step English instructions and a handy measuring spoon included, plus video tutorials to ensure your fermentation success. - • **Supercharged Fermentation Power:** Harness a potent 1×10¹⁰ CFU/g Bacillus subtilis culture for authentic, gut-friendly natto every time. ## Overview KAWASHIMAYA Natto Starter Spores Powder is a premium, GMO-free Japanese fermentation culture containing 1×10¹⁰ CFU/g Bacillus subtilis derived from soybean extract. This 3-gram resealable pouch can produce between 10 to 30 kilograms of authentic natto, a probiotic-rich superfood high in Vitamin K and protein. Designed for both professional and home use, it includes clear English instructions, a measuring spoon, and video guidance. Store refrigerated to maintain potency. Backed by a satisfaction guarantee, it empowers you to craft fresh, nutrient-dense natto with ease. ## Description Explore True Japanese Umami Founded in Japan in 2011, KAWASHIMAYA connects you to the heart of Japanese cuisine. We curate artisanal, high-quality products to bring true Japanese umami to your everyday dining. Explore True Japanese Umami Founded in Japan in 2011, KAWASHIMAYA connects you to the heart of Japanese cuisine. We curate artisanal, high-quality products to bring true Japanese umami to your everyday dining. Curated Japanese Pantry Visit the Store Curated Japanese Pantry Visit the Store NEW ARRIVALS Visit the Store NEW ARRIVALS Organic Products Collection Visit the Store Organic Products Collection Review: Superfood, nutrition, healing - I am getting consistently excellent results using Kawashimaya Natto Starter. I am careful to sterilize everything I use by boiling hot water and pouring it in vessel I use and utensils. I SOAK 2 cups Laura Natto soy beans for 24 hours, drain Rinse, then pressure cooker 1/2 an hour with 15 minute natural release. **mix 2 motto spoons(tiny spoon that comes with starter) starter with 4 Tblsp. Of BOILED BUT **COOLED DOWN**purified water. **PUT this MIXED SOLUTION on the Natto Bean immediately after done cooking in the pressure cooker. MIX THOURUGHLY with beans. NOW Ferment for 24 MORE hours at 102°. (I use a Luvelle yogurt maker which has an automatic Timer upto 36 hours)Then refidgerate for 6+ hours upto 3 days to stop the fermentation and age it. temperatures can very by season's and your indoor temperature. This sounds like a lot of work but its simple: to measure out 2 cups of Natto beans and put in a generous amount of water to soak the beans 24 hours, rinse, put in Instant Pot 1/2 hour(natural release) make solution while you have natto beans cooking, when cooked mix solution through natto beans. FERMENT 24 hours, refrigerated 6+ hours. Lasts 4-5 days in fridge when done. Can freeze them and use the frozen ones to make new batch. Natto is an Excellent superfood. With Nattokinase. Helps with Vitamin D absorption. Hope this helps if your brand new to making Natto. Fresh is best. Combines well with adding 2-4Tbls of your fresh Natto to Basmati rice onion, ginger, garlic, Turmeric(pinch of blak pepper increases turmeric absorption by 2,000%) and some veggies. This is a Congee recipe gentle and healing if you dont feel well, elderly, or young and need gentle foods. Review: It worked for my first batch in Instant Pot, very easy to make - I have made natto from store bought natto, decided to try making it from the starter. My first batch worked so far, natto seems to be pretty good. I am keeping the starter in the freezer until I do my next batch. Here's how I made it in Instant Pot. 1. Soaked the soybeans overnight. 2. Cooked it in Instant Pot on Beans setting for 45 min. (Or High Pressure for 45 min). 3. Strained the water out. 4. While beans are still warm, added the starter and mixed. (I got too excited and added 3 scoops, but one scoop would have been sufficient). 5. Set it on 'Yogurt' setting for 24 hours. Yogurt is 8 hours by default, so adjusted the time to 24 hours. I usually let the natto stay in the fridge overnight after making it. It can stay in the fridge for a few weeks. No issues with the starter, hopefully it will keep working since i'm keeping it in the freezer. It needs to be added to the beans while they are still hot to get activated. Adding it to the cold beans will not activate it. update after 6 months of purchasing. I kept the starter in the freezer, and just made another successful batch of natto, the starter is still alive! The key to activate it is to add it to the soybeans while they are still hot, right after draining them. It does look like a tiny amount, but it's plenty to produce a great natto batch. ## Features - POTENT JAPANESE NATTO STARTER: Made from purely cultured Bacillus Subtilis Natto from soybean extract. Please use it to only make natto—a Japanese superfood packed with vital nutrients like probiotics, Vitamin K, and protein. - HIGH EFFICIENCY: A single 3g (0.1oz) package holds strong fermentative power (1×10^10 CFU/g). Make up to 10-30kg of homemade or business-scale natto. - INSTRUCTION & SPOON INCLUDED: You will receive an email with detailed "How to Make Natto" instructions, and a visual how-to video is available on the product page. A small measurement spoon is also included with your purchase. - CONVENIENT PACKAGING: The starter comes in a resealable zip-lock pouch for easy and safe storage. Please store the packaging at a low temperature or in the refrigerator after arrival, both before and after opening. - MAKE NATTO SUCCESSFULLY: If you encounter any difficulties making natto, simply message us for personalized assistance. 100% refund after we assist your problem is available, because your successful natto-making journey is our priority. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09325M42X | | Best Sellers Rank | #38,722 in Grocery & Gourmet Food ( See Top 100 in Grocery & Gourmet Food ) #158 in Flavoring Powders | | Brand | KAWASHIMAYA | | Brand Name | KAWASHIMAYA | | Container Type | Resealable Pouch | | Cuisine | Japanese cuisine | | Customer Reviews | 4.5 out of 5 stars 264 Reviews | | Item Form | Powder | | Item Package Weight | 0.02 Kilograms | | Item Weight | 10 Grams | | Manufacturer | KAWASHIMAYA | | Number of Items | 1 | | Number of Pieces | 1 | | Package Size Name | Single | | Package Weight | 0.02 Kilograms | | Size | 0.11 Ounce (Pack of 1) | | Specialty | Low Calorie | ## Product Details - **Brand:** KAWASHIMAYA - **Item Form:** Powder - **Item Weight:** 10 Grams - **Package Weight:** 0.02 Kilograms - **Specialty:** Low Calorie ## Images ![Kawashimaya Natto Starter Powder 3g (0.1oz), To Make 10-30kg of Homemade Natto, Bacillus Subtilis From Soybean Extract - Image 1](https://m.media-amazon.com/images/I/61pYSSZM+2L.jpg) ![Kawashimaya Natto Starter Powder 3g (0.1oz), To Make 10-30kg of Homemade Natto, Bacillus Subtilis From Soybean Extract - Image 2](https://m.media-amazon.com/images/I/81jSMtvVEsL.jpg) ![Kawashimaya Natto Starter Powder 3g (0.1oz), To Make 10-30kg of Homemade Natto, Bacillus Subtilis From Soybean Extract - Image 3](https://m.media-amazon.com/images/I/71NT1miN+CS.jpg) ![Kawashimaya Natto Starter Powder 3g (0.1oz), To Make 10-30kg of Homemade Natto, Bacillus Subtilis From Soybean Extract - Image 4](https://m.media-amazon.com/images/I/71nn2dDl2oL.jpg) ![Kawashimaya Natto Starter Powder 3g (0.1oz), To Make 10-30kg of Homemade Natto, Bacillus Subtilis From Soybean Extract - Image 5](https://m.media-amazon.com/images/I/71RItuLAE8L.jpg) ## Available Options This product comes in different **Pattern** options. ## Questions & Answers **Q: Can you drink natto starter as a supplement?** A: Please do not drink it because it is a natto starter specially made for natto making. **Q: Can you use natto as a starter?** A: Store-brought natto has a weaker bacteria power than natto starter. Please use this natto starter with higher bacteria power and quality. A small package goes a long way. **Q: Why is my natto doesn’t have the sticky string?** A: Maybe the fermentation process did not go well. Ferment it for about 12 more hours. **Q: Why does my natto smell like ammonia?** A: Let it sit in the refrigerator overnight after the warming process. Fermentation will stop, and the odor of ammonia can be alleviated. **Q: Is it okay to eat natto everyday?** A: Natto is high in protein, fiber, minerals, Vitamin K, Vitamin C, etc. Please eat one serving of natto (150g/5.3oz) per day to get its nutrition and health benefits. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Superfood, nutrition, healing *by T***S on May 14, 2026* I am getting consistently excellent results using Kawashimaya Natto Starter. I am careful to sterilize everything I use by boiling hot water and pouring it in vessel I use and utensils. I SOAK 2 cups Laura Natto soy beans for 24 hours, drain Rinse, then pressure cooker 1/2 an hour with 15 minute natural release. **mix 2 motto spoons(tiny spoon that comes with starter) starter with 4 Tblsp. Of BOILED BUT **COOLED DOWN**purified water. **PUT this MIXED SOLUTION on the Natto Bean immediately after done cooking in the pressure cooker. MIX THOURUGHLY with beans. NOW Ferment for 24 MORE hours at 102°. (I use a Luvelle yogurt maker which has an automatic Timer upto 36 hours)Then refidgerate for 6+ hours upto 3 days to stop the fermentation and age it. temperatures can very by season's and your indoor temperature. This sounds like a lot of work but its simple: to measure out 2 cups of Natto beans and put in a generous amount of water to soak the beans 24 hours, rinse, put in Instant Pot 1/2 hour(natural release) make solution while you have natto beans cooking, when cooked mix solution through natto beans. FERMENT 24 hours, refrigerated 6+ hours. Lasts 4-5 days in fridge when done. Can freeze them and use the frozen ones to make new batch. Natto is an Excellent superfood. With Nattokinase. Helps with Vitamin D absorption. Hope this helps if your brand new to making Natto. Fresh is best. Combines well with adding 2-4Tbls of your fresh Natto to Basmati rice onion, ginger, garlic, Turmeric(pinch of blak pepper increases turmeric absorption by 2,000%) and some veggies. This is a Congee recipe gentle and healing if you dont feel well, elderly, or young and need gentle foods. ### ⭐⭐⭐⭐⭐ It worked for my first batch in Instant Pot, very easy to make *by M***H on August 21, 2024* I have made natto from store bought natto, decided to try making it from the starter. My first batch worked so far, natto seems to be pretty good. I am keeping the starter in the freezer until I do my next batch. Here's how I made it in Instant Pot. 1. Soaked the soybeans overnight. 2. Cooked it in Instant Pot on Beans setting for 45 min. (Or High Pressure for 45 min). 3. Strained the water out. 4. While beans are still warm, added the starter and mixed. (I got too excited and added 3 scoops, but one scoop would have been sufficient). 5. Set it on 'Yogurt' setting for 24 hours. Yogurt is 8 hours by default, so adjusted the time to 24 hours. I usually let the natto stay in the fridge overnight after making it. It can stay in the fridge for a few weeks. No issues with the starter, hopefully it will keep working since i'm keeping it in the freezer. It needs to be added to the beans while they are still hot to get activated. Adding it to the cold beans will not activate it. update after 6 months of purchasing. I kept the starter in the freezer, and just made another successful batch of natto, the starter is still alive! The key to activate it is to add it to the soybeans while they are still hot, right after draining them. It does look like a tiny amount, but it's plenty to produce a great natto batch. ### ⭐⭐⭐⭐⭐ Makes Good Natto! *by M***C on November 12, 2025* It works! Thanks to the reviewers here for their tips. The product video was also good with the step by step. I used Instant Pot to pressure cook beans and used the yogurt feature for fermentation. Thank you Kawshimaya for making this available to buy! ## Frequently Bought Together - Kawashimaya Natto Starter Spores Powder 0.1 oz (3g), Can make up to 10-30kg Natto, Made From Organic Soybean Extract - Soymerica Non-GMO Soybeans - 7 Lbs. Identity Preserved (IP). Great for Soy Milk and Tofu. 100% Product of USA. Non-GMO Project Verified - Japanese Natto Starter Spores (Nattomoto) - 3g (enough to make 30kg of natto). 100% Organic Soybean Extract. 100% Product of Japan --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/312773928-kawashimaya-natto-starter-powder-3g-0-1oz-to-make-10](https://www.desertcart.hr/products/312773928-kawashimaya-natto-starter-powder-3g-0-1oz-to-make-10) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-06-09*