diff --git a/anki/features/chinese/__init__.py b/anki/features/chinese/__init__.py
index dda2e4e10..9eefb4bb2 100644
--- a/anki/features/chinese/__init__.py
+++ b/anki/features/chinese/__init__.py
@@ -7,6 +7,11 @@ from anki.utils import findTag, stripHTML
 from anki.hooks import addHook
 from anki.db import *
 
+cantoneseTag = "Cantonese"
+mandarinTag = "Mandarin"
+srcField = "Expression"
+dstField = "Reading"
+
 class UnihanController(object):
 
     def __init__(self, target):
@@ -61,19 +66,19 @@ class ChineseGenerator(object):
 unihan = ChineseGenerator()
 
 def onFocusLost(fact, field):
-    if field.name != "Expression":
+    if field.name != srcField:
         return
-    if findTag("Cantonese", fact.model.tags):
+    if findTag(cantoneseTag, fact.model.tags):
         type = "cantonese"
-    elif findTag("Mandarin", fact.model.tags):
+    elif findTag(mandarinTag, fact.model.tags):
         type = "mandarin"
     else:
         return
     try:
-        if fact['Reading']:
+        if fact[dstField]:
             return
     except:
         return
-    fact['Reading'] = unihan.toReading(type, field.value)
+    fact[dstField] = unihan.toReading(type, field.value)
 
 addHook('fact.focusLost', onFocusLost)
diff --git a/anki/features/japanese.py b/anki/features/japanese.py
index e9ee3f4e6..8fce19b78 100644
--- a/anki/features/japanese.py
+++ b/anki/features/japanese.py
@@ -6,6 +6,10 @@ import sys, os
 from anki.utils import findTag, stripHTML
 from anki.hooks import addHook
 
+modelTag = "Japanese"
+srcField = "Expression"
+dstField = "Reading"
+
 class KakasiController(object):
     def __init__(self):
         # add our pre-packaged kakasi to the path
@@ -90,17 +94,17 @@ if not kakasi.available():
 def onFocusLost(fact, field):
     if not kakasi:
         return
-    if field.name != "Expression":
+    if field.name != srcField:
         return
-    if not findTag("Japanese", fact.model.tags):
+    if not findTag(modelTag, fact.model.tags):
         return
     try:
-        if fact['Reading']:
+        if fact[dstField]:
             return
     except:
         return
     tmp = kakasi.toFurigana(field.value)
     if tmp != field.value:
-        fact['Reading'] = tmp
+        fact[dstField] = tmp
 
 addHook('fact.focusLost', onFocusLost)