May be a basic question but I am struggling with it.
Following it the HTML form on submitting the Content-Type:application/x-www-form-urlencoded without charset:utf-8.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>HTML Form with UTF-8</title>
</head>
<body>
<form action="/reporting" method="post">
<!-- Form fields go here -->
<label for="name">Name:</label>
<input type="text" id="name" name="name">
<label for="email">Email:</label>
<input type="email" id="email" name="email">
<input type="submit" value="Submit">
</form>
</body>
</html>
The problem I am facing is the parameter are not interpreted correctly if it's Japanese characters. If I modify the request using developer's tool and run with modified header which is charset:utf-8 from power shell the result is correct. Please let me know if anyone have any idea.
i think the issue can be related to how its translating from the form try this in your form and mark this if it works , just try not saying it will but error could be coming from there, Goodluck :) add this in the tag of the form after method='post' accept-charset="UTF-8"