









🌿 Unlock Japan’s ancient superfood magic at home—ferment like a pro!
Kawashimaya Natto Starter Spores Powder is a premium, 100% organic soybean extract culture with a powerful 1×10¹⁰ CFU/g fermentation capacity. This 3g pack can produce up to 30kg of authentic Japanese natto, rich in probiotics, Vitamin K, and proteins. Designed for both beginners and pros, it includes clear English instructions, a measuring spoon, and resealable packaging to ensure freshness. Made in Japan and backed by a 100% satisfaction refund, it’s your gateway to effortless, health-boosting natto at home.

















| ASIN | B09325M42X |
| Best Sellers Rank | #82,398 in Health ( See Top 100 in Health ) #283 in Fruits Extract Supplements |
| Brand | KAWASHIMAYA |
| Brand Name | KAWASHIMAYA |
| Customer Reviews | 4.5 out of 5 stars 255 Reviews |
| Item Package Weight | 0.02 Kilograms |
| Item Weight | 10 Grams |
| Item weight | 10 Grams |
| Manufacturer | KAWASHIMAYA |
| Number of Pieces | 1 |
| Package weight | 0.02 Kilograms |
| Size | 0.11 Ounce (Pack of 1) |
| Specialty | Organic |
| Unit Count | 3.0 Grams |
| Unit count | 3.0 Grams |
B**I
Not a lot for the cost, but I love Natto and want to make it myself.
I am new to making my own Natto, I made two batches with this sachet, one was successful and the second wasn't. I have no idea why but I assume it was my process otherwise I wouldn't have managed to get a good batch first. I am waiting for it to become available to buy again so I can have another go, as I really love natto and knowing how fantastically healthy it is for you, I want to keep producing it.
A**K
Highly recommend
Very authentic results; potent fermentation that is easily activated and produces mild, pleasant flavour
L**G
Natto buonissimo
Finalmente ho trovato uno starter molto buono e che funziona. Il fatto che sia poi prodotto in Giappone aumenta la sua considerazione. Nella confezione non è specificato la quantità per soya. Probabilmente in Giappone variano a secondo del prodotto che vogliono ottenere. Io uso 1 gr per 1 kg di soya cotta. Di solito ne preparo 400 gr che è già tanto. Ne mangio 50/ 100 gr al giorno.
M**H
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.
R**T
Il me restera a confectionner un Nato Japonais directement chez moi , juste Wowww
Reçu comme promis
Trustpilot
1 day ago
1 week ago