Why PropertyPlaceholder cant load UTF-8 encoded file in Camel Route ?

Issue

• My property file contains Japanese characters, like following :

data.one =  こんにちは .

• When I try to read the property, in my camel route it's throwing following error:

Route(route8)[[From[file:C:\DataDir]] -> [Log[RECIEVING MODULE ... because of Property with key [data.one] not found in properties from text: RECIEVING MODULE SECTION {{data.one}}
    at org.apache.camel.model.RouteDefinition.addRoutes(RouteDefinition.java:912)[145:org.apache.camel.camel-core:2.12.0.redhat-610379]

• My camel-context file is

 <camelContext xmlns="http://camel.apache.org/schema/spring">
    <propertyPlaceholder location="file:C:\PropertiesFileDir\TestProp.properties" id="placeholder" />
     <route>
       <from uri="file:C:\DataDir" />
        <log message="Test Message {{data.one}}" loggingLevel="INFO" logName="INPUT"/>
       <to uri="file:C:\DestinationDir" />
    </route>
  </camelContext>

• On debugging I found that the class in camel-core which loads the property file is using inputstream. ie , code snippets from "DefaultPropertiesResolver.class" in "camel-core" is given below:

protected Properties loadPropertiesFromFilePath(CamelContext context, boolean ignoreMissingLocation, String path) throws IOException {
065        Properties answer = new Properties();
066
067        if (path.startsWith("file:")) {
068            path = ObjectHelper.after(path, "file:");
069        }
070
071        InputStream is = null;
072        try {
073            is = new FileInputStream(path);
074            answer.load(is);
075        } catch (FileNotFoundException e) {
076            if (!ignoreMissingLocation) {
077                throw e;
078            }
079        } finally {
080            IOHelper.close(is);
081        }
082
083        return answer;
084    }

• How to override the method loadPropertiesFromFilePath ?
• Where the method implementation will contains something like:

InputStreamReader isr = null;
            try {
                is = new FileInputStream(path);
                    isr = new InputStreamReader(is, "UTF-8");
                answer.load(isr);
            } catch (FileNotFoundException e) {
                if (!ignoreMissingLocation) {
                    throw e;
                }
            } finally {
                isr.close();
                    IOHelper.close(is);
            }