July 22, 2026
Hello, thank you for using Ondoku.
In this article, we will explain Ondoku's payment methods and receipts.
All Ondoku invoices and receipts are compatible with the invoice system (Qualified Invoice Issuer Registration Number) (please also see the related article).
[Table of Contents]
Payment methods for Ondoku's monthly plans are supported via:
Click here to purchase an Ondoku monthly plan

If you wish to make an annual contract with credit/debit card payment, you can purchase it from the link below.
Card payment: Ondoku Annual Contract

If you would like a receipt for credit card/debit card (Stripe) payments:
will serve as the receipt.

When the purchase is completed at Ondoku, a receipt email like the one above will be sent to the specified email address.
(Just in case, please authorize the domain "stripe.com" from which the receipt will be sent.)
Similarly, an email from which you can download the invoice and receipt will be sent from Stripe. When you download the invoice, it will be displayed like this.

Invoices and receipts are compatible with the invoice system.
Information such as the name and address on the receipt reflects the content at the time of payment.
Due to the specifications of the payment service "Stripe," even if you change this information later, you cannot download an invoice or receipt with the updated information.
From the next payment onwards, you can download invoices and receipts with the reflected content.
The display of the registration number on invoices and receipts downloadable from the Stripe email will be as shown in the red box.
This number depends on Stripe's settings and cannot be changed.
If you need a receipt with the item labeled "Registration Number," please log in to Ondoku and download it from the Card Usage Statement and Receipt.
Receipts issued by Ondoku can be easily obtained by logging into Ondoku and going to Settings → Card Usage Statement and Receipt.



It can be obtained easily like this. It's very convenient, so please use it.
For more details, please check this article.

If it is difficult to use Ondoku because "you do not have a credit card in the name of a company, school, or organization, or you cannot prepare a debit card," we recommend:
Bank transfer can be used by anyone, regardless of whether they are an individual, corporation, or school.
Please note that there are several precautions for paying Ondoku via bank transfer.
Please consider carefully which plan or business plan you will choose before using the service.

I'm wondering which plan I should use...
If you are unsure about which plan to use >> Inquire about the best plan and usage method


Please check this blog to see if sharing among multiple people is possible for use in corporations, schools, etc.
Related Article >> When using Ondoku in a corporation, is it okay for multiple employees to share a single company account?

For annual contracts, the readable character count for 12 months will be refilled all at once.
(In the case of the Premium Plan, you can use 12 million characters for one year.)
If the account runs out of readable characters, you can use 12 million characters for one year from the date of payment by paying for a new year.
The fees per year are as follows.
[Price]
If you wish to make an annual contract with credit/debit card payment, you can purchase it from this link.
Card payment: Ondoku Annual Contract

*In the case of credit/debit card payments, the plan and readable character count will be reflected in about 1 to 3 minutes.
*Credit/debit card payments are set to automatic renewal for annual recurring payments. If you do not wish to renew automatically, please cancel after payment.
If you wish to make an annual contract via bank transfer, please contact us following these steps.

The plan will be activated within 24 hours in principle after the transfer is confirmed.
If the username and the sender's name are different, we cannot confirm the payment. Please be sure to let us know via inquiry.
*In case of urgency, we can handle the plan activation if you inform us of the approximate payment date even before the funds arrive.
In that case, please contact us via inquiry after issuing the invoice.
Furthermore, if we cannot confirm the payment even after 3 days have passed since the notified payment date, we will suspend the account.
*If the desired start date is after the payment date, please notify us by email at least 3 business days in advance. If the contact and the payment are reversed, we cannot accommodate the request.
(Example) Payment on March 20th → Desired start date is April 1st
Please notify us by email 3 business days before March 20th.
We cannot accommodate the request even if you notify us by email on the day of March 20th.
For more details on issuing invoices, please see here.
Subject: Desired start date for annual contract
I am contacting you regarding the desired start date for Ondoku's annual contract.
Invoice number:
Desired usage start date: Year/Month/Day
Scheduled payment date: Year/Month/Day
*Normally, the plan starts after payment, but by informing us of the scheduled payment date, it is possible to use the service in advance on the desired date before payment.
*If the desired start date is after the payment date, please notify us by email at least 3 business days in advance. If the contact and the payment are reversed, we cannot accommodate the request.

After the plan is activated, you can download the receipt from the Invoice Issuance History.
Ondoku offers business plans to cater to various use cases.
By using the Business Plan:
The Business Plan is for sole proprietors and corporations.
It is recommended if you do not want to include credit or if you want to keep using the audio.
The overview of the Business Plan is as follows.
For more details, please see this article.
Purchase with credit/debit card payment here → https://ondoku3.com/pricing/business/
*In the case of credit/debit card payments, the plan and readable character count will be reflected in about 1 to 3 minutes.
*Credit/debit card payments are set to automatic renewal for annual recurring payments. If you do not wish to renew automatically, please cancel after payment.
If you wish to make an annual contract via bank transfer, please contact us following these steps.

The plan will be activated within 24 hours in principle after the transfer is confirmed.
If the username and the sender's name are different, we cannot confirm the payment. Please be sure to let us know via inquiry.
Estimates and invoices without payment or contact for more than 3 months will be deleted as expired.
*In case of urgency, we can handle the plan activation if you inform us of the approximate payment date even before the funds arrive.
In that case, please contact us via inquiry after issuing the invoice.
Furthermore, if we cannot confirm the payment even after 3 days have passed since the notified payment date, we will suspend the account.
*If the desired start date is after the payment date, please notify us by email at least 3 business days in advance. If the contact and the payment are reversed, we cannot accommodate the request.
(Example) Payment on March 20th → Desired start date is April 1st
Please notify us by email 3 business days before March 20th.
We cannot accommodate the request even if you notify us by email on the day of March 20th.
For more details on issuing invoices, please see here.
Subject: Desired start date for annual contract
I am contacting you regarding the desired start date for Ondoku's annual contract.
Invoice number:
Desired usage start date: Year/Month/Day
Scheduled payment date: Year/Month/Day
*Normally, the plan starts after payment, but by informing us of the scheduled payment date, it is possible to use the service in advance on the desired date before payment.
*If the desired start date is after the payment date, please notify us by email at least 3 business days in advance. If the contact and the payment are reversed, we cannot accommodate the request.

After the plan is activated, you can download the receipt from the Invoice Issuance History.
For those who wish for a receipt:
will serve as the receipt.
For more details, please check this article.
We will guide you on how to issue a receipt when paying with a credit or debit card. For those who wish for a receipt, the Receipt Email and the Usage Statement and Receipt issued by Ondoku will serve as the receipt.
After the payment confirmation is complete and the plan is activated, you can download the receipt from the Invoice Issuance History.
If you have any other questions, please feel free to contact us.
Thank you for your continued support of Ondoku.
"Ondoku" is an online text-to-speech tool that can be used with no initial costs.
To use it, simply enter text or upload a file on the site. A natural-sounding audio file will be generated within seconds. You can use voice synthesis up to 5,000 characters for free, so please give it a try.
"Ondoku" is a Text-to-Speech service that anyone can use for free without installation. If you register for free, you can get up to 5000 characters for free each month. Register now for free