diff --git a/.gitattributes b/.gitattributes
index 28f9298d37a..ffc0020126a 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -858,6 +858,7 @@ icu4j/tools/build/icu4j46.api2.gz -text
 icu4j/tools/build/icu4j48.api2.gz -text
 icu4j/tools/build/icu4j49.api2.gz -text
 icu4j/tools/build/icu4j50.api2.gz -text
+icu4j/tools/build/icu4j51.api2.gz -text
 icu4j/tools/build/manifest.stub -text
 icu4j/tools/misc/.settings/org.eclipse.core.resources.prefs -text
 icu4j/tools/misc/manifest.stub -text
diff --git a/icu4j/APIChangeReport.html b/icu4j/APIChangeReport.html
index c0048c27bae..d356072c5e2 100644
--- a/icu4j/APIChangeReport.html
+++ b/icu4j/APIChangeReport.html
@@ -2,11 +2,11 @@
 <html>
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
-<title>ICU4J API Comparison: ICU4J 50.1 with ICU4J 51.0.1</title>
+<title>ICU4J API Comparison: ICU4J 50.1 with ICU4J 51.1</title>
 <!-- Copyright 2013, IBM, All Rights Reserved. -->
 </head>
 <body>
-<h1>ICU4J API Comparison: ICU4J 50.1 with ICU4J 51.0.1</h1>
+<h1>ICU4J API Comparison: ICU4J 50.1 with ICU4J 51.1</h1>
 
 <hr/>
 <h2>Removed from ICU4J 50.1</h2>
@@ -23,7 +23,7 @@ TimeZoneFormat
 
 
 <hr/>
-<h2>Deprecated or Obsoleted in ICU4J 51.0.1</h2>
+<h2>Deprecated or Obsoleted in ICU4J 51.1</h2>
 
 <h3>Package com.ibm.icu.text</h3>
 <ul>
@@ -47,11 +47,11 @@ LocaleData
 
 
 <hr/>
-<h2>Changed in ICU4J 51.0.1 (old, new)</h2>
+<h2>Changed in ICU4J 51.1 (old, new)</h2>
 <p>(no API changed)</p>
 
 <hr/>
-<h2>Promoted to stable in ICU4J 51.0.1</h2>
+<h2>Promoted to stable in ICU4J 51.1</h2>
 
 <h3>Package com.ibm.icu.charset</h3>
 <ul>
@@ -194,7 +194,7 @@ VTimeZone
 
 
 <hr/>
-<h2>Added in ICU4J 51.0.1</h2>
+<h2>Added in ICU4J 51.1</h2>
 
 <h3>Package com.ibm.icu.lang</h3>
 <ul>
@@ -271,6 +271,6 @@ TimeZoneFormat
 </ul>
 
 <hr/>
-<p><i><font size="-1">Contents generated by ReportAPI tool on Tue Feb 19 14:07:28 EST 2013<br/>Copyright (C) 2013, International Business Machines Corporation, All Rights Reserved.</font></i></p>
+<p><i><font size="-1">Contents generated by ReportAPI tool on Tue Mar 05 00:09:35 EST 2013<br/>Copyright (C) 2013, International Business Machines Corporation, All Rights Reserved.</font></i></p>
 </body>
 </html>
diff --git a/icu4j/tools/build/icu4j51.api2.gz b/icu4j/tools/build/icu4j51.api2.gz
new file mode 100644
index 00000000000..c2fbb00c38b
--- /dev/null
+++ b/icu4j/tools/build/icu4j51.api2.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e9123db86ebf82488fbf3433f1a3ec947c31dfed7ff2e106146e459b45e3a10b
+size 45752
