import xlsx is not utf-8

[niusmake]

import xlsx is not utf-8,

My xlsx is japanese language.

Then I try this code is not utf-8..

https://gyazo.com/a6878a113f3c7c0edb19e2c144197ef1
And japanese columns is disappears

public function import(){
       $filePath = public_path().'/file'.'/'.'test.xlsx';
       Excel::load($filePath,function($reader) {
            $test = $reader->get();
            dd($test);
       }, 'UTF-8');
       return $test;
}

How can I do, Please help me~

My Package version, Laravel version

"laravel/framework": "5.3.*",
 "maatwebsite/excel": "~2.1.0"

[niusmake]

I find the problem,
is "excel.php" find 'to_ascii' => true, change this false.
problem is ok~