Red Rice Koji Spores (2025)

Symbolic picture. All products that we sell are viable for at least 2 months. Any spores that are viable for less time will be on sale.

Rated 5.00 out of 5 based on 31 customer ratings

(31 customer reviews)

This is a strain for long-term rice misos, also known as red rice miso.

To avoid any confusion: this is NOT Monascus Purpureus. It is Aspergillus Oryzae. We don’t sell M. Purpureus, as it is both hard to source and hard to grow.

31 reviews for Red Rice Koji Spores

1. Rated 5 out of 5

   Sebastian B. (verified owner) – 08/03/2025

   Koji worked its magic! The spores did as promised.
   Nice Customer service. Great information on website.

2. Rated 5 out of 5

   Erwin Zwart (verified owner) – 13/12/2024

3. Rated 5 out of 5

   Horváth Dániel (verified owner) – 17/11/2024

   Works very well even at low temp 30 C. Started a few batches and now looking forward the aging,

4. Rated 5 out of 5

   Zsuzsa Balogh (verified owner) – 24/06/2024

5. Rated 5 out of 5

   VERONIQUE FORTIN (verified owner) – 02/06/2024

6. Rated 5 out of 5

   Charlie Gros (verified owner) – 12/04/2024

   Amazing!!!!

7. Rated 5 out of 5

   Erlis Themeli (verified owner) – 08/04/2024

   Delivery was fast, well labelled and accompanied by an explanatory leaflet.
   For me, this was the first experience using spores to make koji. I used these spores to inoculate basmati rice and all when fine.
   I used the koji to make different short fermentation miso from soya beans, split peas, and dark lentils + dried porcini mushrooms. I made also a long fermentation batch with soya beans.

8. Rated 5 out of 5

   Armando Trapletti (verified owner) – 16/02/2024

9. Rated 5 out of 5

   Jürgen (verified owner) – 02/02/2024

   Super fast delivery. Great quality that allows me to produce perfect Koji from different types of rice even with my selfmade stuff. Can 100% recommend the spores!

10. Rated 5 out of 5

    Guido Bauhammer (verified owner) – 08/01/2024

11. Rated 5 out of 5

    Cédric Laborde (verified owner) – 14/07/2023

    Fast delivery and perfectly packed. I have already used red koji spores that have worked perfectly with the basic solution, oven and hot water bottles. 4 kg of miso are aging, and I did a little bit of shio koji.

12. Rated 5 out of 5

    Sebastian Kihlstrand (verified owner) – 14/06/2023

13. Rated 5 out of 5

    Fulvia (verified owner) – 27/05/2023

14. Rated 5 out of 5

    Tobias Friedrich (verified owner) – 15/04/2023

15. Rated 5 out of 5

    Andy Willis (verified owner) – 05/04/2023

16. Rated 5 out of 5

    Xenia Blanco (verified owner) – 01/03/2023

17. Rated 5 out of 5

    Xenia Blanco (verified owner) – 01/03/2023

18. Rated 5 out of 5

    Davide belli (verified owner) – 10/02/2023

19. Rated 5 out of 5

    Sarah F. (verified owner) – 15/01/2023

20. Rated 5 out of 5

    catherine limouzy (verified owner) – 08/01/2023

21. Rated 5 out of 5

    KARLIS LANGINS (verified owner) – 09/12/2022

22. Rated 5 out of 5

    Ludwig Ringbom (verified owner) – 23/11/2022

23. Rated 5 out of 5

    Paul Florence (verified owner) – 26/10/2022

24. Rated 5 out of 5

    Luis Sánchez (verified owner) – 06/10/2022

    Awesome!

25. Rated 5 out of 5

    Delphine Rehfuss (verified owner) – 14/06/2022

26. Rated 5 out of 5

    João Alves (verified owner) – 12/06/2022

27. Rated 5 out of 5

    James Sherwin (verified owner) – 10/06/2022

28. Rated 5 out of 5

    Claudia Liliana Quiroz Ramirez (verified owner) – 27/04/2022

29. Rated 5 out of 5

    Eric Morris (verified owner) – 10/04/2022

30. Rated 5 out of 5

    Enrico Bufarini (verified owner) – 22/02/2021

    Very good products. I use this strain for making sweet red miso (Edo miso) because it needs just one month of fermentation, I cannot wait 12-24 month for red miso. The sweet red miso tastes delicious.
    I incubated my Koji at 30 degrees C for 48 hours.

31. Rated 5 out of 5

    Jean-Luc (verified owner) – 08/06/2020

    Cultured on basmati rice, at room temp. Kitchen at 25-26°C, rice/koji mat temp at 30-31°C.
    Fully grown at 50 hours.

    rich overripe fruit fragrance.

    Quick and reliable shipment to Switzerland.