About payment

・Credit card payment


*If you pay with one of the above credit cards, your credit card number will be sent to the credit card company without going through the store you ordered from.

・Cashless payment

[Handling company]

・Yamato courier cash on delivery

[Cash-on-delivery charge] Nationwide flat rate: 0 yen [Handling amount] Less than 300,000 yen (tax included)

■ The total payment amount is the product price total.

*We will bear the delivery fee.

■Please pay cash to the shipping company in exchange for the product when the product arrives.

* You cannot pay by card with cash on delivery.

·Bank transfer

If you wish to pay by bank transfer, please fill in the delivery address, phone number, purchase item number, and quantity on the inquiry page and send it. We will inform you of the transfer amount and bank account in return.

About fees

■Credit card payment uniform fee 0 yen (※ fee will be borne by our company.)

■ bank transfer
Transfer fee is borne by the customer

Yamato takkyubin (home delivery service) cash on delivery
Uniform fee 0 yen (*We will bear the fee.)

Payment deadline

■ If you choose to pay by credit card

Payment will be completed after the product is shipped.
Please check the closing date and payment date of each credit card company for the withdrawal date.

■If you choose cash on delivery, please pay cash to the shipping company in exchange for the product when it arrives.
*We do not accept payment by card.

■In the case of bank transfer, the product will be shipped after the payment is confirmed.


About delivery

delivery date

  • We will ship same day or next day after you place your order. (Limited to our business days)
  • Depending on the product, it may take time to ship. If you are in a hurry, please be sure to check the delivery date in advance. (Especially the ram air system and aero parts take a long time to deliver.)
  • We do not ship on our holidays.

delivery method

  • Yamato Courier (Meitetsu Transport for large cargo, others)


  • Please refer to the shipping estimate in the product page.

About delivery time

[Timing of delivery]
If there is no delivery time specified
After completing the payment on this site, we will ship it sequentially on our business day. (Cash on delivery will be shipped sequentially after confirming the order details).
Please note that the delivery timing may change for each product. Please check the estimated shipping date on each product page.
If you purchase products with different shipping dates at the same time, such as pre-order sales or multiple sales, they will be delivered together with the product with the latest shipping date.

● When specifying the delivery time zone

Delivery time zone

Morning, 14:00-16:00, 16:00-18:00, 18:00-20:00, 19:00-21:00

*However, even if the time is specified, it may not be possible to deliver within the specified time due to circumstances. *It will be delivered on the shortest possible date within the time zone specified above.

If you do not specify the delivery time, we will deliver it in the shortest possible day.

Time zone designation may not be available in some areas.

About delivery to overseas

We do not ship outside of Japan.


About returns

  • Conditions for accepting returns
    Only unused and unopened products can be returned if contacted within 30 days of receipt. If you wish to cancel your order or return it, please forward the order confirmation email to order1@gruppem.co.jp , specifying the item to be returned and the reason for the return.
  • Regarding return shipping and handling charges
    The customer is responsible for the shipping fee and the transfer fee for the refund. If the product is returned by cash on delivery, the amount will be deducted from the refund amount. If there is exterior damage and evidence of unpacking, we will reduce the amount depending on the situation.
  • About refund
    We will process the refund after confirming the arrival of the returned product.

The refund method depends on the payment method used at the time of purchase.

For credit cards and Apple Pay :
The date on which we process the return will be the approximate date on which the charge to the credit card company will be cancelled. Therefore, if your credit card company's closing date is exceeded, the refund will be made on the next debit date.

For bank transfer and cash on delivery:
We will transfer the money to your designated account.

*In principle, refunds will be made through the shopping site, except in the case of cash on delivery. Exceptionally, when a refund is issued by us, please note that we may deduct the amount equivalent to various points granted by the transaction in question. In any case, the transfer fee for the refund will be borne by the customer.

  • return contact
    Email address: order1@gruppem.co.jp

*Except for initial defects, we do not accept product exchanges. We apologize for the inconvenience, but please make a new order after completing the return procedure for your convenience.