diff --git a/cjk/NotoSansCJK-Regular.ttc b/cjk/NotoSansCJK-Regular.ttc
index 2dd4a60..d9a2262 100644
--- a/cjk/NotoSansCJK-Regular.ttc
+++ b/cjk/NotoSansCJK-Regular.ttc
Binary files differ
diff --git a/cjk/README.android b/cjk/README.android
index 5671de2..e5d0f79 100644
--- a/cjk/README.android
+++ b/cjk/README.android
@@ -7,4 +7,5 @@
 Noto CJK fonts, for supporting Chinese, Japanese, and Korean.
 
 Local Modifications:
-No modifications.
+The fonts have been modified to remove cmap entries for characters
+that should default to emoji style in Android.
diff --git a/cjk/subset_noto_cjk.py b/cjk/subset_noto_cjk.py
new file mode 100755
index 0000000..8167267
--- /dev/null
+++ b/cjk/subset_noto_cjk.py
@@ -0,0 +1,102 @@
+#!/usr/bin/python
+# coding=UTF-8
+#
+# Copyright 2016 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Create a curated subset of Noto CJK for Android."""
+
+import os
+
+from fontTools import ttLib
+from nototools import font_data
+from nototools import ttc_utils
+
+# Characters supported in Noto CJK fonts that UTR #51 recommends default to
+# emoji-style.
+EMOJI_IN_CJK = {
+    0x26BD, # ⚽ SOCCER BALL
+    0x26BE, # ⚾ BASEBALL
+    0x1F18E, # 🆎 NEGATIVE SQUARED AB
+    0x1F191, # 🆑 SQUARED CL
+    0x1F192, # 🆒 SQUARED COOL
+    0x1F193, # 🆓 SQUARED FREE
+    0x1F194, # 🆔 SQUARED ID
+    0x1F195, # 🆕 SQUARED NEW
+    0x1F196, # 🆖 SQUARED NG
+    0x1F197, # 🆗 SQUARED OK
+    0x1F198, # 🆘 SQUARED SOS
+    0x1F199, # 🆙 SQUARED UP WITH EXCLAMATION MARK
+    0x1F19A, # 🆚 SQUARED VS
+    0x1F201, # 🈁 SQUARED KATAKANA KOKO
+    0x1F21A, # 🈚 SQUARED CJK UNIFIED IDEOGRAPH-7121
+    0x1F22F, # 🈯 SQUARED CJK UNIFIED IDEOGRAPH-6307
+    0x1F232, # 🈲 SQUARED CJK UNIFIED IDEOGRAPH-7981
+    0x1F233, # 🈳 SQUARED CJK UNIFIED IDEOGRAPH-7A7A
+    0x1F234, # 🈴 SQUARED CJK UNIFIED IDEOGRAPH-5408
+    0x1F235, # 🈵 SQUARED CJK UNIFIED IDEOGRAPH-6E80
+    0x1F236, # 🈶 SQUARED CJK UNIFIED IDEOGRAPH-6709
+    0x1F238, # 🈸 SQUARED CJK UNIFIED IDEOGRAPH-7533
+    0x1F239, # 🈹 SQUARED CJK UNIFIED IDEOGRAPH-5272
+    0x1F23A, # 🈺 SQUARED CJK UNIFIED IDEOGRAPH-55B6
+    0x1F250, # 🉐 CIRCLED IDEOGRAPH ADVANTAGE
+    0x1F251, # 🉑 CIRCLED IDEOGRAPH ACCEPT
+}
+
+# Characters we have decided we are doing as emoji-style in Android,
+# despite UTR #51's recommendation
+ANDROID_EMOJI = {
+    0x2600, # ☀ BLACK SUN WITH RAYS
+    0x2601, # ☁ CLOUD
+    0X260E, # ☎ BLACK TELEPHONE
+    0x261D, # ☝ WHITE UP POINTING INDEX
+    0x263A, # ☺ WHITE SMILING FACE
+    0x2660, # ♠ BLACK SPADE SUIT
+    0x2663, # ♣ BLACK CLUB SUIT
+    0x2665, # ♥ BLACK HEART SUIT
+    0x2666, # ♦ BLACK DIAMOND SUIT
+    0x270C, # ✌ VICTORY HAND
+    0x2744, # ❄ SNOWFLAKE
+    0x2764, # ❤ HEAVY BLACK HEART
+}
+
+
+def remove_from_cmap(infile, outfile, exclude=frozenset()):
+    """Removes a set of characters from a font file's cmap table."""
+    font = ttLib.TTFont(infile)
+    font_data.delete_from_cmap(font, exclude)
+    font.save(outfile)
+
+
+TTC_NAME = 'NotoSansCJK-Regular.ttc'
+OTF_NAMES = ['NotoSans%sCJK%s-Regular.otf' % (mono, variant)
+             for mono in ['', 'Mono']
+             for variant in ['jp', 'kr', 'sc', 'tc']]
+TEMP_DIR = 'no-emoji'
+
+
+if not os.path.exists(TEMP_DIR):
+    os.mkdir(TEMP_DIR)
+
+for index, otf_name in enumerate(OTF_NAMES):
+    print 'Subsetting %s...' % otf_name
+    font = ttLib.TTFont(TTC_NAME, fontNumber=index)
+    font.save(otf_name)
+    remove_from_cmap(
+        otf_name,
+        os.path.join(TEMP_DIR, otf_name),
+        exclude=sorted(EMOJI_IN_CJK | ANDROID_EMOJI))
+
+os.chdir(TEMP_DIR)
+ttc_utils.build_ttc(TTC_NAME, OTF_NAMES)