Terms of Use

Scope and eligibility

These terms apply to the app named on this page, provided by STUDIO-GENNAI (we/us), and to its official web demo if one is available. The product description, supported environment, price and access period presented before purchase also form part of your contract. Where a store is the contracting party for payment or distribution, the store terms identified at checkout also apply to that transaction.

We publish these terms for new use and purchases from 5 November 2026. They do not retrospectively reduce existing purchase terms or acquired rights. If you are a minor, obtain any parent or guardian approval required by the law where you live and the store terms. Check the store for the app's intended age group and distribution regions. A translation does not promise availability or the ability to purchase in any particular country.

The free app and visual demo

Hitohiki is a game that represents the feeling of preparing fish through short smartphone movements and haptic feedback. It is free and has no in-app purchases, subscriptions, advertisements or account registration. Sensor input is a gameplay estimate, not a measurement of absolute position, actual cutting force or knife skills.

Motion/haptic support and the sensation vary with hardware, OS and settings. The web version and environments without supported sensors provide a visual demo, without the native app's motion input or haptic experience. The game is not instruction or training in real fish preparation or using knives.

Playing safely

Hold your device securely, keep space clear of people and objects, and use small movements. Do not shake or swing the device forcefully or play while walking or driving. No real knife or fish is needed.

Stop if you feel pain, numbness, dizziness or discomfort from vibration. Adjust haptic strength using the app and device settings. These precautions do not shift our legal responsibility to you.

Local information and support

The native app works offline without our own analytics, tracking or upload functions. Sensor information is handled on the device; settings and best ratings are stored locally. We do not provide cloud syncing or data recovery. Clearing data, uninstalling, device failure or replacement may remove records. OS backups follow the OS settings.

For information handling on the promotional website and visual demo, see the website privacy policy. App data handling and our contact details are also explained in the app privacy policy and support page.

Permission to use and ownership

We grant you a non-exclusive right to use a lawfully obtained copy in accordance with these terms and your purchase conditions. The app's software, artwork, audio and other content belong to us or their respective rights holders. We do not acquire ownership of your own text or other material you create using the app, or a licence to use it for advertising or AI training.

Do not infringe others' rights, gain unauthorised access, introduce malware, bypass payment or authentication unlawfully, interfere with the service or redistribute the app without permission. This does not restrict analysis, copying or other activities permitted by applicable law, including applicable interoperability exceptions.

Consumer rights, including the EEA and UK

Mandatory consumer protection in your country of residence takes priority, including applicable protection in the European Economic Area (EEA) and United Kingdom. Being free of charge does not by itself remove any statutory rights that apply.

As required by applicable law, digital content must conform to its description and contract and meet reasonably expected quality and functionality. Services must be provided with reasonable care and skill. If content is faulty or not supplied, you may be entitled, subject to the legal conditions, to a free correction, repair or replacement, a price reduction, termination and a refund. We will also provide and inform you about compatibility and security updates for the period and to the extent required by law.

We will not reject a statutory claim solely because a store's voluntary refund window has expired. You may use the purchasing store's process and contact us about defects and your rights. Store procedures do not replace your statutory remedies.

Updates, changes and discontinuation

We may change the app or these terms for security, compatibility, legal compliance or to correct defects. We will not unilaterally remove the essential content or access period promised at purchase. For material changes or discontinuation, we will give reasonable advance notice of the reason, effect, timing and your options, using a durable medium such as email where the law requires it. Urgent safety changes will be explained as soon as reasonably possible.

Where applicable law allows you to terminate free of charge or obtain a refund because a change has more than a minor negative impact on your use or access, we will respect that right. A notice alone will not add a paid product or subscription to your contract. Any required consent and purchase steps are separate.

Problems and our responsibility

Interruptions or errors may occur because of the OS, hardware, connectivity or other conditions, including on supported devices. For help, tell us your device model, OS/app version and the steps that led to the problem. Do not send passwords, card details or unnecessary recordings or personal information.

We are responsible under applicable law for loss caused by our breach of contract or failure to use reasonable care. We do not exclude liability for death or personal injury caused by our negligence, fraud, or anything else the law does not allow us to exclude or restrict. Explaining a functional limitation, including possible data loss, does not remove our legal responsibility.

Law, complaints and languages

Japanese law governs these terms, without depriving you of mandatory consumer protection in your country of habitual residence. Nothing restricts your right under applicable law to bring a claim in a court where you live or seek help from a regulator or consumer advice body. You do not have to contact us first to exercise those rights.

The Japanese and English versions are intended to communicate the same conditions. Any difference in wording remains subject to your applicable legal protection and will not be used to narrow your statutory rights.

Contact and complaints

For a defect, purchase problem, complaint or statutory request, email us using the address below. We will review your request and explain the next steps; you do not need to make another purchase to ask for help.

Privacy and store assistance

• App privacy policy (Japanese)
• App support (Japanese)
• Website privacy policy (Japanese)