JijSolver API Free Version Terms of Service
1. Introduction
1.1. These Terms of Service (hereinafter referred to as "these Terms") establish the conditions for the use of the free version of the "JijSolver API" mathematical optimization cloud service (hereinafter referred to as "the Service") provided by Jij Inc. (hereinafter referred to as "the Company").
1.2. All individuals or legal entities using the Service (hereinafter referred to as "the User") must agree to these Terms prior to using the Service.
1.3. By using the Service, the User is deemed to have agreed to these Terms, and a contract concerning the use of the Service (hereinafter referred to as "the Agreement") shall be formed between the Company and the User.
2. Definitions
The terms used in this Agreement shall have the meanings defined below:
2.1. "JijSolver": The mathematical optimization solver provided by the Company.
2.2. "The Service": The free version of the "JijSolver API," which provides JijSolver as a cloud service API.
2.3. "User": Any individual or legal entity that agrees to these Terms and uses the Service.
2.4. "User Information": The name, email address, and other personal information registered by the User for the use of the Service.
2.5. "Access Information": The API hostname and the unique token issued to the User for the purpose of using the Service.
3. Service Content and Conditions of Use
3.1. The specific content, conditions of use, and limitations of the Service shall be as described on the application form for the Service.
3.2. The Company may change the content of the Service without prior notice.
3.3. The following acts are strictly prohibited in connection with the use of the Service:
3.3.1. Reselling, re-lending, or granting sublicenses to the Service.
3.3.2. Permitting any third party to use the Service.
3.3.3. Sharing Access Information for the Service with any third party.
3.4. In the event that a User allows its employees or the employees of its contractors to use the Service, the User shall be responsible for ensuring that said employees comply with these Terms. Any violation of these Terms by such an employee shall be deemed a violation by the User.
3.5. The User shall bear all responsibility for its use of the Service and shall appropriately manage its Access Information to prevent unauthorized use by third parties.
4. Application for Use
4.1. Use of the Service requires an application that includes User Information. The User shall provide accurate and up-to-date User Information at the time of application.
4.2. The Company may, at its sole discretion, refuse an application for use. The Company is not obligated to disclose the reasons for such refusal.
5. Prohibited Acts
In using the Service, the User shall not engage in any of the following acts:
5.1. Acts that violate laws and regulations or are contrary to public order and morals.
5.2. Acts that infringe upon the intellectual property rights of the Company or any third party.
5.3. Acts that interfere with the operation of the Service.
5.4. Acts of unauthorized access to the Service or any other acts that breach its security.
5.5. Acts of reverse engineering, decompiling, disassembling, or otherwise attempting to analyze the source code of the Service.
5.6. Any other acts that the Company deems inappropriate, including those that significantly contravene the intended purpose of the Service.
6. Intellectual Property Rights
6.1. All intellectual property rights related to the Service belong to the Company or to third parties that have granted licenses to the Company.
6.2. Rights related to the calculation results obtained by the User through the use of the Service shall belong to the User.
6.3. Intellectual property rights newly created in connection with the use of the Service shall belong to the party that created such intellectual property.
6.4. The User agrees that the Company may freely use any feedback, suggestions, or other information provided by the User concerning the functionality, usability, performance, or other aspects of the Service.
7. Handling of Data
7.1. The Company shall not use data entered into the Service by the User for any purpose other than providing the Service.
7.2. The Company may collect and analyze anonymized statistical usage data for the purpose of improving the Service.
8. Disclaimers
8.1. The Service is provided "as is" without warranty of any kind. The Company makes no warranties, whether express or implied, including but not limited to any warranties of completeness, accuracy, reliability, usefulness, fitness for a particular purpose, or non-infringement.
8.2. The Company does not warrant that the Service will be uninterrupted or error-free, or that the results obtained through the Service will be accurate.
8.3. The Company may change, add to, or delete the content, specifications, or functions of the Service without prior notice. The Company shall not be liable for any damages incurred by the User as a result of such changes.
8.4. The Company shall not be liable for any damages whatsoever (including, but not limited to, direct, indirect, special, or consequential damages, or lost profits) arising out of the use or inability to use the Service.
8.5. The User shall use the Service at its own risk and discretion and shall bear all risks associated with the use of the Service.
8.6. In the event of a dispute between the User and a third party in connection with the use of the Service, the User shall resolve such dispute at its own responsibility and expense and shall hold the Company harmless from any trouble or damage.
9. Termination of the Agreement
9.1. The Company may suspend the User's use of the Service and terminate the Agreement without any notice if the User violates any provision of these Terms.
9.2. The Company may immediately suspend the User's use of the Service and terminate the Agreement if the User falls under any of the following conditions:
9.2.1. When a petition for bankruptcy, civil rehabilitation, corporate reorganization, or special liquidation is filed.
9.2.2. When a petition for provisional attachment, provisional disposition, compulsory execution, or auction is filed.
9.2.3. When a transaction is suspended by a clearing house.
9.2.4. When a disposition for tax delinquency is received.
10. Exclusion of Anti-Social Forces
The User represents and warrants that it is not an Anti-Social Force (which includes, but is not limited to, organized crime groups (boryokudan), members of such groups, associate members of such groups, companies affiliated with such groups, corporate racketeers (sokaiya), groups engaging in criminal activities under the guise of social movements, or special intelligence violence groups) and that it has no relationship whatsoever with any Anti-Social Forces.
11. Privacy
The Company's Privacy Policy constitutes a part of these Terms. Please review the Company's Privacy Policy in connection with the use of the Service.
12. Modification of these Terms
12.1. The Company may modify these Terms at any time.
12.2. In the event of a modification to these Terms, the Company will notify Users of the content of the modified terms and their effective date by posting them on the Company's website or by another method determined by the Company.
12.3. The modified terms shall become effective on the effective date stipulated in the preceding paragraph.
12.4. If a User uses the Service after receiving notice of a modification to these Terms, or if the User does not terminate the use of the Service within 30 days of the effective date, said User shall be deemed to have agreed to the modified terms.
13. Survival
Even after the termination of the Agreement, the provisions of Article 6 (Intellectual Property Rights), Article 7 (Handling of Data), Article 8 (Disclaimers), Article 11 (Privacy), Article 13 (Survival), Article 14 (Governing Law and Jurisdiction), and Article 15 (Resolution by Consultation) shall remain in full force and effect.
14. Governing Law and Jurisdiction
14.1. The interpretation and application of these Terms shall be governed by the laws of Japan.
14.2. The Tokyo District Court shall have exclusive jurisdiction in the first instance over any and all disputes arising out of or in connection with these Terms.
15. Resolution by Consultation
The Company and the User shall endeavor to promptly resolve any matter not stipulated in these Terms or any doubt in the interpretation of these Terms through consultation in good faith.
Last Updated: June 11, 2025