diff --git a/convert2skk/aozora2skk.rb b/convert2skk/aozora2skk.rb
index d3f0a09..b2255dd 100755
--- a/convert2skk/aozora2skk.rb
+++ b/convert2skk/aozora2skk.rb
@@ -35,6 +35,7 @@
 # ○
 
 Encoding.default_external = "euc-jis-2004"
+STDOUT.set_encoding("euc-jis-2004", "utf-8")
 require 'optparse'
 
 opt = OptionParser.new
diff --git a/convert2skk/chasen2skk.rb b/convert2skk/chasen2skk.rb
index 0b76e34..8012103 100755
--- a/convert2skk/chasen2skk.rb
+++ b/convert2skk/chasen2skk.rb
@@ -43,6 +43,7 @@
 ##
 
 Encoding.default_external = "euc-jis-2004"
+STDOUT.set_encoding("euc-jis-2004", "utf-8")
 require_relative 'skkdictools'
 require 'optparse'
 
diff --git a/convert2skk/ipadic2skk.rb b/convert2skk/ipadic2skk.rb
index 6c3b34f..27e5a94 100755
--- a/convert2skk/ipadic2skk.rb
+++ b/convert2skk/ipadic2skk.rb
@@ -41,6 +41,7 @@
 ##
 
 Encoding.default_external = "euc-jis-2004"
+STDOUT.set_encoding("euc-jis-2004", "utf-8")
 require_relative 'skkdictools'
 require 'optparse'
 
diff --git a/convert2skk/prime2skk.rb b/convert2skk/prime2skk.rb
index 5fc2d45..3edb86a 100755
--- a/convert2skk/prime2skk.rb
+++ b/convert2skk/prime2skk.rb
@@ -39,6 +39,7 @@
 ##
 
 Encoding.default_external = "euc-jis-2004"
+STDOUT.set_encoding("euc-jis-2004", "utf-8")
 require_relative 'skkdictools'
 require 'optparse'
 opt = OptionParser.new