Terms of service

Wika is a service of Kenjin Labs LLC (合同会社), a Japanese company and the parent company of Wika. “Kenjin Labs,” “we,” and “us” mean Kenjin Labs LLC. Its registered office is Private Booth 103, Umetsu Nishiuramachi 23-7, Ukyo-ku, Kyoto, Japan. Kenjin Labs is described at kenjinlabs.com. Notices about Wika still go through the Wika contact form.

“School” means the organization that has a Wika account, and the people who use that account for the school, including owners, teachers, staff, and students.

The school is the customer. Students and teachers do not each form a separate contract with us. They use Wika under the school’s account. The school makes sure they follow these terms and the school’s own rules.

If you are a teacher or a school owner, you confirm that you are allowed to use the account for the school and that you can bind the school to these terms. You also confirm that you are at least 18. A student uses the account the school provided and does not take on the school’s payment or indemnity duties.

There is no public sign-up. We open accounts for schools, and we may refuse an account.

Wika lets a school generate language lessons, edit them, assign them to a class, and see who started, who finished, and how they scored. Students can read, listen, save words, and take quizzes.

Wika is a tool for teachers. It is not a school, a tutor, or an exam board. It does not replace a teacher’s judgment, and it does not run the class.

We may change, limit, or remove features, including how often lessons can be generated. A feature that exists today may not exist later.

The school keeps sign-in details private and is responsible for what happens with its accounts. If an account is being misused, tell us through the contact form. We may suspend or close access to protect the service, the school, or anyone else.

The school resets student passwords. We do not reset them from the public contact form.

A signed-in person may change their own name and password. The school controls student accounts, classes, and whether an account stays active.

The school will:

• Give us only information it has the right to give.
• Have any permission the law requires before a student is added, including a parent’s or guardian’s permission when the student is a child.
• Choose what a lesson is for, and review it before students rely on it.
• Keep notes and topics suitable for the class.
• Use Wika for the school’s own teaching and learning.

What a teacher or a student does with the school’s account is the school’s responsibility to us.

Lessons are produced with artificial intelligence and can be edited by the school. A lesson can be wrong, awkward, incomplete, or unsuitable. A level setting, including CEFR, is a target the system is asked to follow. It is not a guarantee that the lesson meets that level, a curriculum, or an exam.

IELTS, TOEFL, and TOEIC appear only as a rough guide for choosing a level. They are trademarks of their owners. Wika is not affiliated with, endorsed by, or approved by those organizations. A lesson or a quiz score is not an official result, and it does not predict one.

Audio is computer-generated speech. It can mispronounce a word.

Quiz scores, completion, and recall grades describe activity inside Wika. They become a course grade only if the school decides to treat them that way. They are not our assessment of a student.

The school reviews a lesson before assigning it. A wrong line can be edited, regenerated, or left unused.

The school will not do any of the following, and will not allow anyone else to:

• Break the law, or infringe someone’s rights, through Wika.
• Submit or generate material that is unlawful, or that exploits a child.
• Try to view another school’s data, probe the service, or bypass a limit or a security control.
• Share an account outside the school, resell access, or present Wika as the school’s own product.
• Copy, scrape, or harvest the service, or use it to build or train a competing product or model.
• Overload the service, or use it to send spam or to attack anyone.
• Reverse engineer the service, except where a law forbids that restriction.
• Present AI output as a person’s unaided work where someone is entitled to know how it was made.

We may remove material, or suspend or close an account, when we believe these rules are broken or when the service needs protection. We may review content. We do not take on a duty to monitor it.

If you believe material on Wika infringes a copyright, send a note through the contact form. Include the work you own, the material you believe infringes it, and a way for us to reach you about that note. We may remove the material. We may also close an account that repeatedly infringes.

We own Wika. That includes the software, the design, the words on the public site, the branding, the prompts, and the way lessons are structured. These terms do not transfer any ownership of Wika. While an account is open and these terms are followed, the school has a limited right to use the service. That right cannot be transferred to anyone else.

The school keeps ownership of what it submits, such as a topic, an edit, a student note, or a word a student saves.

The school gives us permission to host, copy, display, adapt, and process that material, and to send the parts described in the Privacy policy to our providers, so we can run the service, secure it, and make lessons and audio. This permission lasts for as long as we hold the material, including in backups.

The school may use lessons the service generates for its own teaching, and for its students’ study, while the account is open. The school will not sell those lessons as a standalone product, publish them as a competing service, or claim ownership of the system that created them. We keep the methods, prompts, and generic lesson patterns that are not specific to the school, and we may keep using them.

If you send a suggestion, we may use it permanently, without payment or credit.

The school promises that it has the rights it needs for anything it submits, and that using that material in Wika does not violate anyone else’s rights.

If these terms are ever provided in another language, the English version controls when the two differ.

The Privacy policy describes the information we collect and how we use it. Where the law requires it, the school tells its teachers and students, and points them to that policy.

The service is provided as available. It may stop or slow down for maintenance, for a failure, or for something outside our control, including a failure of a hosting, AI, or speech provider. We promise a particular level of uptime only in a separate writing we have signed.

Fees, if any, are the commercial terms we agree with the school in writing. If no fee has been agreed, we may still provide access, and we may end it under these terms. Taxes and payment timing are as that writing states. Unless that writing says otherwise, fees already paid stay paid, to the extent the law allows.

Wika does not collect payment-card numbers inside the product. Payment, when there is a fee, is arranged outside the product unless we later agree otherwise in writing.

We may change fees for a future period. A fee already agreed for a current paid period stays as that agreement describes.

The school may stop using Wika at any time, and may ask us through the contact form to close the account.

We may suspend or close an account, or stop the service, at any time. Where it is reasonable and we have a practical way to reach the school, we will try to give notice. We may act without notice if there is risk to the service, to a person, or to the law, or if an agreed fee is overdue.

When an account ends, the right to use the service ends. We may delete the school’s information as the Privacy policy describes. We do not promise to keep a copy, or to provide one in a particular format. The school should keep anything it still needs.

Sections that should sensibly continue — including permissions that have not ended, disclaimers, limits on liability, indemnity, and disputes — stay in effect after the account ends.

The service, the lessons, the audio, the scores, and any guidance are provided “as is” and “as available.” In everyday terms: Wika does not guarantee that the service, a lesson, the audio, or a score will be accurate, always available, or right for a particular class or exam.

To the fullest extent the law allows, we disclaim every warranty, express, implied, or statutory. That includes merchantability, fitness for a particular purpose, title, non-infringement, accuracy, and quiet enjoyment. We do not warrant that the service will be uninterrupted, secure, or free of errors, or that a lesson will be accurate, appropriate, original, or fit for a class, a level, or an exam.

Some places do not allow certain disclaimers. In those places, the disclaimer applies as far as the law allows.

To the fullest extent Japanese law allows, Kenjin Labs and its staff and suppliers are not liable for indirect, incidental, special, consequential, or punitive damages. They are not liable for lost profits, revenue, goodwill, data, or teaching time, or for a student’s results, an exam outcome, or a hiring or academic decision. This applies even if we were told those losses were possible.

To the fullest extent Japanese law allows, our total liability for every claim arising out of the service or these terms is limited to the greater of the fees the school paid us for Wika in the three months before the claim, or 10,000 yen.

These limits apply under every theory, including contract, tort, and statute. They are a basic part of the bargain. Access is offered because they apply.

Where the law does not allow a limit, the limit applies as far as the law does allow, and the rest of these terms still apply. Nothing here limits liability that a law does not allow us to limit, including fraud or willful misconduct.

The school will defend and indemnify Kenjin Labs and its staff and suppliers, and hold them harmless, against any claim, loss, and reasonable legal cost arising out of the school’s content, a user of the school’s account, the school’s failure to get a permission the law requires, the school’s use of a lesson or a score, or the school’s breach of these terms.

We may control the defense of a claim against us. The school will cooperate. The school will not settle a claim in a way that admits fault by us, or that puts a duty on us, unless we agree in writing.

These terms are governed by the laws of Japan. The Kyoto District Court is the exclusive court of first instance for any dispute arising out of the service or these terms. The school agrees to that court.

To the extent Japanese law allows, the school brings any claim on its own behalf, and not as part of a collective or representative action.

A claim arising out of the service or these terms must be filed within one year after it arose, unless Japanese law requires a longer period. After that year, the claim is barred.

Before filing, the school will send a short description through the contact form and allow 30 days to try to resolve it. We may still go to court immediately to stop misuse of the service or of our intellectual property.

If a mandatory law in the school’s country gives a person a right that cannot be waived, that right still applies to that person. The rest of these terms remain in force.

We may update these terms by posting a new version on this page and changing the date. Use of Wika after that posting is acceptance. If the school does not agree, it must stop and ask us to close the account.

If one part of these terms is held invalid, the rest stays in effect. Waiting to enforce a right is not a waiver. These terms, the Privacy policy, and any written fee agreement are the whole agreement about the service. They replace earlier discussions about it. A purchase order or a school policy does not change these terms unless we agree in a writing that says it does.

The school may not assign these terms without our consent. We may assign them, including as part of a reorganization or a sale of the service.

We are not liable for a delay or a failure caused by something beyond our reasonable control. A supplier who is protected by these terms may rely on them.

Notices and questions about these terms go through the contact form. We do not accept legal notices at a published email address.