diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
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+* @tsutomi
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diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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+# Contributing
+
+We highly appreciate contributions to this project. We are open to any kind of contribution, including but not limited to:
+
+- Reporting a bug
+- Requesting a feature
+- Submitting a pull request
+- Writing documentation
+- Writing tests
+- Providing feedback
+
+## Pull Requests
+
+When you want to contribute to the source code of the project, please follow these steps:
+
+1. Fork the repository
+2. Create a new branch for your feature or bug fix
+3. Write your code
+4. Write tests for your code
+5. Run the tests
+6. Commit your changes
+7. Push your changes to your fork
+8. Create a pull request
+
+The requests will be reviewed and merged as soon as possible, but please be patient. We will get back to you as soon as we can.
+
+It might be possible that we ask you to make some changes to your pull request. We will do our best to help you with that.
+
+## Reporting a Bug
+
+If you find a bug in the project, please report it by creating a new issue. Please provide as much information as possible, including:
+
+- The version of the project you are using
+- The steps to reproduce the bug
+- The expected behavior
+- The actual behavior
+- Any other information that might be useful
+
+## License
+
+By contributing to this project, you agree that your contributions will be licensed under the [License](LICENSE) of this project.
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