diff --git a/src/main.zig b/src/main.zig
index 898f907e9551a45a85d81a89e98dedd680b588f4..362097749f21628e98002c23dbff979903f0cb1a 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -87,7 +87,7 @@ export fn u_hasBinaryProperty(cp: u32, prop: t.UProperty) bool {
         .UCHAR_BLOCK => false, // TODO
         .UCHAR_CANONICAL_COMBINING_CLASS => false, // TODO
         .UCHAR_DECOMPOSITION_TYPE => false, // TODO
-        .UCHAR_EAST_ASIAN_WIDTH => false, // TODO
+        .UCHAR_EAST_ASIAN_WIDTH => icu.eastAsianWidth(cp) != null,
         .UCHAR_GENERAL_CATEGORY => false, // TODO
         .UCHAR_JOINING_GROUP => false, // TODO
         .UCHAR_JOINING_TYPE => false, // TODO
diff --git a/src/root.zig b/src/root.zig
index 7db54a563d3d6fcd1ae5f92f574675b951a7f6c0..5bf45ae3efffa754e7220cbb0e9498258954a0a8 100644
--- a/src/root.zig
+++ b/src/root.zig
@@ -47,3 +47,13 @@ pub fn age(cp: u32) [2]u8 {
     }
     return .{ 0, 0 };
 }
+
+pub fn eastAsianWidth(cp: u32) ?ucd.EastAsianWidth {
+    @setEvalBranchQuota(100_000);
+    inline for (ucd.east_asian_width.data) |item| {
+        if (cp >= item.from and cp <= item.to) {
+            return item.prop;
+        }
+    }
+    return null;
+}