diff --git a/package.json b/package.json
index c8f41bc..da30ab9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "d3-format",
-  "version": "0.3.1",
+  "version": "0.3.2",
   "description": "Format numbers for human consumption.",
   "keywords": [
     "d3",
diff --git a/src/locale/ja-JP.js b/src/locale/ja-JP.js
index ecd282e..2e997a1 100644
--- a/src/locale/ja-JP.js
+++ b/src/locale/ja-JP.js
@@ -1,5 +1,5 @@
 export default {
-  decimal: ",",
+  decimal: ".",
   thousands: ",",
   grouping: [3],
   currency: ["", "円"]