my @headings =
  (
   { key => 'k',    name => 'Kanji',      class => 'kanji'},
   { key => 'skip', name => 'SKIP',       class => 'skip-code'},
   { key => 'co',   name => 'Suggestion', class => 'skip-code'},
   { key => 'disc', name => 'Discussion'},
  );
[download]

I don't know where you got the break after the opening curly from

    {
         key => 'disc', name => 'Discussion'},
[download]

(Update: *I can't reproduce this!* I can now, see reply )

BUT cperl-mode offers 8 indent-styles (also available from the menu)

M-x cperl-set-style

BSD     C++     CPerl     Current
GNU     K&R     PerlStyle     Whitesmith
[download]

... and plenty of customizations

Cperl Indentation Details group: Indentation.
       State : something in this group has been changed outside custom
+ize.
   
Show Value Cperl Brace Imaginary Offset 
   Imagined indentation of a Perl open brace that actually follows a s
+tatement. Hide
   An open brace following other text is treated as if it were this fa
+r
   to the right of the start of its line.

Show Value Cperl Brace Offset 
   Extra indentation for braces, compared with other text in same cont
+ext.

Show Value Cperl Break One Line Blocks When Indent 
   Non-nil means that one-line if/unless/while/until/for/foreach BLOCK
+s Hide
   need to be reformatted into multiline ones when indenting a region.

Show Value Cperl Close Paren Offset 
   Extra indent for substatements that start with close-parenthesis.

Hide Cperl Comment Column: 40
    State : SAVED and set.
   Column to put comments in CPerl (use M-x cperl-indent to lineup wit
+h code).

Show Value Cperl Continued Brace Offset 
   Extra indent for substatements that start with open-braces. Hide
   This is in addition to cperl-continued-statement-offset.

Show Value Cperl Continued Statement Offset 
   Extra indent for lines not starting new statements.

Show Value Cperl Fix Hanging Brace When Indent 
   Non-nil means that BLOCK-end `}' may be put on a separate line Hide
   when indenting a region.
   Braces followed by else/elsif/while/until are excepted.

Show Value Cperl Indent Comment At Column 0 
   Non-nil means that comment started at column 0 should be indentable
+.

Show Value Cperl Indent Left Aligned Comments 
   Non-nil means that the comment starting in leftmost column should i
+ndent.

Hide Cperl Indent Level: 2
    State : CHANGED outside Customize.
   Indentation of CPerl statements with respect to containing block.

Show Value Cperl Indent Parens As Block 
   Non-nil means that non-block ()-, {}- and []-groups are indented as
+ blocks, Hide
   but for trailing "," inside the group, which won't increase indenta
+tion.
   One should tune up `cperl-close-paren-offset' as well.

Show Value Cperl Indent Region Fix Constructs 
   Amount of space to insert between `}' and `else' or `elsif' Hide
   in `cperl-indent-region'.  Set to nil to leave as is.  Values other
   than 1 and nil will probably not work.

Show Value Cperl Indent Wrt Brace 
   Non-nil means indent statements in if/etc block relative brace, not
+ if/etc. Hide
   Versions 5.2 ... 5.20 behaved as if this were `nil'.

Show Value Cperl Label Offset 
   Offset of CPerl label lines relative to usual indentation.

Show Value Cperl Lineup Step 
   `cperl-lineup' will always lineup at multiple of this number. Hide
   If nil, the value of `cperl-indent-level' will be used.

Show Value Cperl Merge Trailing Else 
   Non-nil means that BLOCK-end `}' followed by else/elsif/continue Hi
+de
   may be merged to be on the same line when indenting a region.

Show Value Cperl Min Label Indent 
   Minimal offset of CPerl label lines.

Show Value Cperl Regexp Indent Step 
   Indentation used when beautifying regexps. Hide
   If nil, the value of `cperl-indent-level' will be used.

Show Value Cperl Tab Always Indent 
   Non-nil means TAB in CPerl mode should always reindent the current 
+line, Hide
   regardless of where in the line point is when the TAB command is us
+ed.
[download]

you might wanna read the micro-docs in the menu and experiment.