Thank you for always using our online store.

Recently, we have seen an increase in cases where customers contact us after a purchase without providing their "order name," "order number," "purchase date," or "purchased item," and only state their inquiry. In such cases, it takes time to confirm the details, making it difficult to respond smoothly.

Therefore, when contacting us after a purchase, please be sure to include the information mentioned above. Thank you for your cooperation.

Additionally, we have received inquiries regarding products purchased from stores other than our online store, or inquiries mistakenly directed to us instead of another company.
We sincerely regret to inform you that we cannot provide any support for products not purchased through our online store.

Please confirm your "place of purchase" and "correct contact information" beforehand to avoid sending mistaken inquiries.

【Shipping within Japan】

・Koji Starter Orders: Free Shipping

(Up to 6 bags shipped via Nekopos, 7 bags or more shipped via Yamato Transport Takkyubin.)

・orise Series: 800 yen nationwide (Yamato Transport Cool Parcel - Frozen)

・Dried Koji: 800 yen nationwide (Yamato Transport Cool Parcel - Refrigerated)

・Fresh Koji: 800 yen nationwide (Yamato Transport Cool Parcel - Frozen)

*Please note that refrigerated and frozen items cannot be combined in one shipment and will incur separate shipping fees.

*Additional shipping fees apply for deliveries to Hokkaido and Okinawa. Shipping costs can be confirmed on the order screen.

【International Shipping】

Varies depending on order content and country.

International orders are shipped via DHL. Shipping costs are automatically calculated on the cart screen, please confirm.

*For orders under 2,000 yen, a document processing fee of +500 yen will be charged.

For domestic delivery within Japan:

Up to 6 bags of seed koji: Nekoposu (delivery date and time cannot be specified; delivery takes 2 days to 1 week from dispatch)

7 or more bags of seed koji, dried koji: Yamato Transport courier service

orise: Yamato Transport refrigerated delivery

Fresh koji: Yamato Transport refrigerated delivery

Please note that items requiring chilled and frozen delivery cannot be combined and will be shipped separately.

Please note that if you place an order on a Saturday, Sunday, or public holiday, shipping will be on the next business day (weekday).
Please order with plenty of time.

For international shipments, we use DHL or EMS. *Only seed koji can be shipped internationally.

If you require a receipt, please review the following important notes, then proceed to the cart screen and enter "Receipt request" along with the [recipient name] and [item description] in the remarks field.

• Note 1

Convenience Store Payment
The payment slip from the payment service provider serves as the official receipt.
To prevent duplicate issuance, we generally do not issue receipts under our company's name for the same payment.
*If you require a receipt in our company's format, please contact us.

• Note 2

Receipts will be issued for the actual amount paid after any deductions, such as coupon usage or discounts.

For receipt requests after placing an order, please contact us via the inquiry form or directly by email at info@kojiyasanzaemon.jp with the [customer name], [order number], [recipient name], and [item description].

As a general rule, we cannot accept cancellations due to customer convenience.

Contains no alcohol.

It is safe for drivers, children, and pregnant women to consume.

When you make koji at home, a certain amount of bacteria will be mixed in. Using that as starter koji to make more koji will lead to culturing bacteria, so you should never do this.

Kojiya Sanzaemon's starter koji is manufactured after thorough quality inspections, so you can use it with confidence. However, if the tools and hands used are not clean, bacteria will grow. Please thoroughly sterilize your tools and hands with about 70% alcohol before making koji.

No genetically modified ingredients are used.

When making koji, be sure to use steamed rice.

If you sprinkle koji seeds on cooked rice, the rice will contain too much moisture and the koji will not form. It can also lead to spoilage.

Koji forms into a sheet when the hyphae of the koji mold grow and intertwine, forming a clump and sheet. The hyphae are cut by loosening the rice while the koji mold is growing, so depending on the number of times and timing of the growth, the hyphae may not fully grow and may not form a sheet. If the product does not form into a sheet, it does not mean it has failed. If there is nothing abnormal in the appearance or smell, it is ready to use.

Spread the finished koji thinly and allow it to cool to room temperature. Once it has cooled to room temperature, place it in a clean bag or container and store it in the freezer. When defrosting, allow it to thaw naturally.

Brown rice has a hard skin, so it does not absorb water easily and koji mold does not grow easily.

We recommend polishing the rice for 2-3 minutes before making koji, rather than using brown rice as is.

Tane koji(koji spores) can be shipped overseas. However, we do not currently ship other products overseas.

It depends on the quantity of products and country. Please confirm the cart screen.

If you order less than 2000JPY, it costs 500JPY for document preparation fee.

We exclude countries with which we have not done business in the past because we need to confirm them. Please contact us before purchasing.

We use DHL and Japan post. Depending on situations, we might not be able to ship by desired shipping methods. In that case, we'll contact by email.

Please contact us before purchasing. We will be happy to consult with you individually.

Please avoid high temperature and high humidity, and store at room temperature. After opening the package, use it up as soon as possible.

Yes, it is possible. Please contact us by email or chat first.