Re^2: How to Fix Character Encoding Damaged Text Using Perl?

Thank you very much, Your Mother!

This works wonderfully, and it makes sense given the known cause of the encoding corruption.

use v5.16;
use utf8;
use open qw( :encoding(UTF-8) :std );
use Encode qw( encode decode );

while (my $damaged_text = <DATA>) {
    chomp $damaged_text;

    my $repaired_text = decode('UTF-8', encode('UCS-2LE', $damaged_text));

    say $repaired_text;
}

close DATA;

exit 0;

__DATA__
敒›剕䕇呎
敌馀⁳潧琠⁯韦겜鯥↽

This prints…

    Re: URGENT
    Let’s go to 日本国!

…as expected.

In this case, use utf8 is required.

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