#!/usr/local/bin/perl
use strict;
use warnings;
use Data::Dumper;    
print Dumper \%ENV;

my %japan = ( 
 tokyo => ["gotanda","shibuya"],
 osaka => "shinsaibashi",
 okinawa => ["naha",yomitan"],
 hokkaido => ["sapporo","obihiro"],
 fukuoka => "hakata",
);

my $japan_ref = \%japan;
print ${$japan_ref}{tokyo};