Add information to be checked prior to submission.

Author: k163377

.github/ISSUE_TEMPLATE/bug_report.md

@@ -11,7 +11,14 @@ assignees: ''
 A clear and concise description of what the bug is.
 
 **To Reproduce**
-Test case or steps to reproduce the behavior or.
+Test case or steps to reproduce the behavior or.  
+It would be appreciated if you could provide code that can be executed with as few changes as possible,
+such as including `import`.
+
+Also, it would be appreciated if you could confirm in advance that the problem is reproduced
+only when using `Kotlin` or `kotlin-module`.  
+For issues that are reproduced only in `Java`, please submit them to the appropriate repository,
+such as [FasterXML/jackson-databind](https://github.com/FasterXML/jackson-databind).
 
 **Expected behavior**
 A clear and concise description of what you expected to happen.