Terms of Service
This English text is a translation of the Japanese original. If the two differ, the Japanese version prevails.
These Terms of Service (the "Terms") set out the conditions for using KETSUIN, a camera-based hand-seal RPG (the "Service"). You may use the Service only if you review and agree to these Terms. Last updated: November 8, 2026 / Consent version: 6. This English text is a translation of the Japanese original. If the two differ, the Japanese version prevails. The revision of November 8, 2026 (version 6) revises the rules on magatama, paid items, and gacha (Article 6), setting out the conditions for the two monthly passes bought for yen, test purchases through Google Play in the Android version, and the deletion of data from the test period.
Article 1 (Scope and Operator)
These Terms apply to the relationship between you and Izaya Kajimoto, an individual who provides the Service (the "Operator"), regarding your use of the Service. If the Operator makes separate in-app rules or notices part of the agreement, it will show their scope and content before you use the Service. Any separate rule that changes the conditions of these Terms also follows the procedure in Article 16. The Operator's contact details are given in Article 17.
Article 2 (Eligibility and Minors)
The Service is intended for people aged 13 or older. If you are under 18, review these Terms and the Privacy Policy with your parent or legal guardian, and obtain their consent to use the Service and to purchase paid items. The Operator may ask you to confirm that consent where necessary. Before sales in yen begin, the Operator will set purchase limits by age and show the amounts and how they are calculated on the purchase screen. These limits do not replace the consent of a parent or legal guardian. If the laws of the region where you live or the age requirements of the app store are stricter, those requirements take precedence.
Article 3 (Player Information, Data Transfer, and Content You Enter)
You may be issued, or may set, a player ID, a display name, credentials, a transfer ID, and a transfer password. Do not disclose your credentials or your transfer password to anyone else, and keep them safe. Your display name, friend code, and invite code are shown to or shared with other users to the extent defined by each feature. If you lose them or suspect misuse, contact the Operator promptly at the address in Article 17. Except where the Operator is responsible or where the law does not allow such a limitation, the Operator is not liable for damage caused by your failure to manage them properly. Your display name, About me text, guild name and guild notices, and other content you enter may be shown to other users. The Operator may refuse input that contains inappropriate words. If a character name or display name contains prohibited words, the Operator may refuse it or replace it with a default name ("Tabibito", Japanese for "traveler"). A character name that contains prohibited words is not accepted, and you will be asked to enter another name. The display name registered before you create a character is replaced with the default name without being refused. Within the app, you can report and block users who enter inappropriate content or harass others. The Operator reviews reported content and, if it violates these Terms, takes reasonable measures such as changing, hiding, or deleting the content or restricting use. If you cannot report within the app, notify the Operator at the address in Article 17.
Article 4 (License and Intellectual Property)
On the condition that you comply with these Terms, the Operator grants you a limited, non-exclusive, non-transferable, and non-sublicensable right to enjoy the Service yourself on a supported device. The program, text, images, audio, names, and all other rights in the Service belong to the Operator or the legitimate rights holders.
Article 5 (Game Data and Beta Version)
Game data is saved on your device and on the server. In-game currency, items, and other data are for use within the Service. You may not buy or sell them between users, exchange them for money, or make any other transaction the Operator has not approved. This does not prevent you from exercising rights under a purchase agreement, or from making any claim for cancellation, termination, return, refund, or damages that the law allows. The Service is currently provided as a beta (test) version before the official service begins. During the beta, the Operator may change specifications, values, and content, and may reset or delete save data without notice. The Operator does not guarantee that beta progress or other data will carry over to the official service.
Article 6 (Magatama, Paid Items, Gacha, and Monthly Passes)
Blue and red magatama are in-game currencies that can be used within the Service. Blue magatama can be used for eligible shop products, eligible gacha, and similar items, and red magatama can be used for eligible gacha. The two balances are managed separately and have no expiration date. The currency accepted, the price, and the quantity are shown on the screen of each product. The products sold for yen are blue magatama products and monthly passes. The purchase details, total price, payment method and timing, delivery timing, and conditions for withdrawing or cancelling an order are shown on the screen before you confirm a purchase and in the "Notation Based on the Act on Specified Commercial Transactions", and information on prepaid payment instruments is published in the "Notation Based on the Payment Services Act". Blue magatama are not exchanged for money or refunded at your request. However, where the law requires a refund or similar measure, such as when the issuing business is discontinued, the Operator will act in accordance with the law. As a rule, the Operator does not accept the withdrawal or cancellation of an order, a return, or a refund after a purchase for your own convenience. However, this does not apply where the law or the rules of the store you used provide otherwise, where the Operator is responsible, or in other comparable cases. If a refund is made under the store's rules, the blue magatama and monthly pass days granted by that purchase are deducted. If your blue magatama balance is insufficient, the shortfall is deducted from blue magatama granted afterwards. There are two monthly passes, the "Monthly Pass" and the "Monthly Pass Plus". Each is a 30-day product bought for yen, with no automatic renewal or recurring charge. The blue magatama given on purchase, the red magatama received on each day you log in, and the effects on XP, the expected number of equipment drops, and vigor capacity are shown on the purchase screen. The equipment drop multiplier applies to the expected number of drops and does not mean that you will always obtain a particular item. The days of a monthly pass are counted with 5:00 a.m. Japan time as the boundary, and the day that includes the time of purchase is day 1. A repeat purchase of the same product adds to its remaining days, and you cannot buy it if the remaining days after the purchase would exceed 90. A monthly pass paid for in a store but not granted because the remaining days would exceed 90 is granted after the remaining days decrease, except for purchases cancelled under the store's rules. Daily red magatama can be received once a day for each product. Amounts for days on which you did not receive them do not carry over. Amounts that were granted but are held as pending rewards because you reached the holding limit are kept. When both monthly passes are active, only the higher of the two applies to each of the XP, equipment drop, and vigor capacity effects, and they are not added together. The blue magatama on purchase and the daily red magatama are given for each product. The candidates in each gacha, the rate for each candidate, the magatama required, and any guarantee, selection, or exchange conditions can be checked on the gacha screen before you draw. Except for any guarantee and any selection or exchange right shown, a gacha does not guarantee that you will obtain a particular item. There is no mechanism that grants a different item for collecting a set of different items. In a gacha drawn with red magatama, red magatama are used first, and you can make up only the shortfall with the same number of blue magatama. In the public version, gacha drawn with blue magatama alone are not offered until store payments are connected. The current test version does not process any payment with real money. In the iOS version, products shown with a yen price may be received through a purchase in the App Store test environment (sandbox). In the Android version, they may be received through a Google Play test purchase, and in other test environments, they may be received free of charge. In these processes, no charge is made. Magatama granted in these ways are not a balance purchased with real money. Data from the test period, including the magatama, items, and monthly pass days granted in testing and their records, will be deleted before the official service begins.
Article 7 (Gift Codes and Invite Codes)
The Operator may provide gift codes that you enter in the app to receive bonuses, and an invite code for each user. The content of a bonus, the deadline for entry, who is eligible, and any limit on the number of uses are shown in the notice for each campaign. You may share your invite code free of charge in the ways the Operator describes. Use gift codes in accordance with the distribution conditions of each campaign. Bonuses delivered to your gift box are kept there until you receive them. It is prohibited to obtain rewards improperly, including by selling or buying codes for value, exchanging them for money, obtaining them improperly, entering them by automated means, or inviting yourself. If improper acquisition or duplicate granting is confirmed, the Operator may cancel the bonus concerned or take other necessary and reasonable measures. When the Operator stops accepting codes or changes the conditions, it will announce the reason, the scope, and when the change applies.
Article 8 (Camera Use and Safety)
Seal recognition uses the front camera. The live video is processed in temporary memory on your device, is not sent to the servers of the Operator or any third party, and is not stored in permanent storage on your device. Even if you do not allow camera access, you can progress with quick cast, which casts techniques without forming seals. Do not play while walking, driving, or in dangerous places. Pay attention to your surroundings and your physical condition, and take a break immediately if you feel pain or fatigue.
Article 9 (Online, Co-op, and Social Features)
Saving progress, data transfer, contacting us, hidden technique checks, sorties, co-op, player-versus-player battles, friends, guilds, and receiving bonuses require a network connection. In co-op and player-versus-player battles, the information needed for the session, such as your display name, equipment and appearance, position, actions, and battle status, is shown to the other participants in the same session. In friends and guilds, your display name, level, and similar information are shown to the other users of that feature. Your About me text is shown only to users who are mutual friends with you. Free-text chat is not provided. Some features may be unavailable depending on network conditions or maintenance.
Article 10 (Prohibited Conduct)
You must not: violate laws; infringe the rights of others; harass or discriminate against others; impersonate others; access systems without authorization; cheat; use bots or other external automation; tamper with progress data or communications; exploit vulnerabilities; place excessive load on the servers; transfer, sell, or exchange for money accounts or in-game data; sell or buy gift codes or invite codes; obtain bonuses or invite rewards by improper means such as using multiple accounts; write content in display names, About me text, or guild names or notices that infringes the rights of others, harasses or discriminates, is sexually inappropriate, contains other people's personal information, or is otherwise inappropriate; analyze, modify, or copy the Service beyond what the law allows; or interfere with the operation of the Service. The Operator has no tolerance for inappropriate content or for harassment of other users.
Article 11 (Measures Against Violations and Suspension)
Depending on the nature, impact, and urgency of a violation, the Operator may take reasonable measures such as a warning, restriction of features, correction of data, or suspension of use. Except where an urgent response is needed, where there is a risk of obstructing an investigation, or where the law restricts it, the Operator will try to tell you the reason. You may raise an objection at the address in Article 17.
Article 12 (Changes, Interruption, and End of the Service)
The Operator may change, interrupt, or end the Service for maintenance, failures, safety, legal compliance, operational needs, or other reasonable reasons. Except in an emergency, the Operator will notify you in advance of major changes or the end of the Service through in-app notices or other reasonable means. If the Service ends, the Operator will make any refund or similar measure required by law in accordance with the law.
Article 13 (Ending Use and Deletion)
You can request deletion of your account from Menu > Info > Account in the app. You can cancel the request in the app for 7 days after making it; after that, the deletion is processed. Uninstalling the app alone does not delete your account on the server. If you cannot use the app, you can send the request to the address in Article 17, together with your player ID or transfer ID. The Operator may ask for additional information to confirm that you are the account holder. When your account is deleted, you can no longer use your magatama balance or the items you purchased. In principle, no refund is made because you chose to delete your account, but this does not take away any right to cancellation, return, or similar remedies that the law allows. If you delete only a character, you cannot undo the deletion. To respond to inquiries, the Operator keeps a copy of a deleted character for 30 days, but does not guarantee that it can be restored. The information kept after deletion and how long it is kept are described in the Privacy Policy.
Article 14 (Handling of Personal Information)
The Operator handles information about you in accordance with the Privacy Policy, which is shown separately. Recognition records, which are numerical statistics of seal recognition results, are collected together with game records as described in section 5 of the Privacy Policy. Camera video, still images, audio, and hand positions and shapes (landmark coordinates) are processed by the app only on your device, and the Operator does not collect them.
Article 15 (Warranty and Limitation of Liability)
The Operator does not guarantee that the Service will always run without interruption, that seal recognition will succeed on every device, or that the Service is free of defects. However, this does not exempt the Operator from any liability it bears under the law. If you suffer damage due to the Operator's slight negligence, the Operator is liable for damages within the scope of damage that would normally arise. This limitation does not apply to damage caused by the willful misconduct or gross negligence of the Operator, its representative, or persons it engages, or to damage to life or body.
Article 16 (Changes to These Terms)
The Operator may change these Terms if the change is in the general interest of users, or if it does not go against the purpose of the agreement and is reasonable in light of the need for the change, the appropriateness of the new content, and other circumstances. Before a change takes effect, the Operator will announce that the Terms will change, the new content, and the effective date through in-app notices or other appropriate means. For changes that require your agreement again under the law or because of their content, you will be asked to agree again the next time you start the app. Continued use or inaction alone is not treated as agreement to a change that requires separate agreement.
Article 17 (Governing Law, Language, Operator, and Contact)
These Terms are governed by the laws of Japan, and jurisdiction over disputes follows the applicable laws. These Terms are written in Japanese. Translations into English or other languages are provided for reference, and if a translation differs from the Japanese version, the Japanese version prevails. Operator: Izaya Kajimoto (an individual). Contact: ketsuinrpg@gmail.com (for inquiries about these Terms and the Service, reports, objections, and account deletion requests). The Operator's address will be disclosed without delay upon request. The in-app contact form is for bug reports and feedback, and does not receive individual replies.
