#!/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"],
);

print "this region is ".
$japan{tokyo}->[0];
print "second region is".
$japan{hokkaido}->[0];

push @{$japan{osaka}},"umeda";

print Dumper(\%japan);