This code can convert a Japanese Shift JIS string to a utf-8 string. Thank 中島さん (Mr Nakajima) for this useful code snippet.
use Unicode::Japanese;
my $keyword="";
$keyword = "something in Japanese like これわ日本語です。";
# use utf-8
my $converter = Unicode::Japanese->new($keyword, 'sjis');
$keyword = $converter->get;
#Su dung $keyword bt