It won't match (?=^ANYTHING) at any place but the very beginning of the string unless you have the /m modifier on in the regex, which allows ^ to match after newlines.

Ohhhhhh. I didn't think you meant ALL the text was indented, I thought you meant the 'field' parts where. Well then, to make it work with such data:

my $code;
{ local $/; $code = <DATA> }  # fast "slurping"

@records = split /\n   (?=\w)/, $code;
for (@records) {
  print ">>$_<<\n";
}

__DATA__
   japhy
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    Regex Prince
   merlyn
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   Mark_Dominus
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japhy... Perl Hacker and Regex Prince