diff --git a/i18n/api/ja.json b/i18n/api/ja.json
index 86ce3ce8..6c29f8f5 100644
--- a/i18n/api/ja.json
+++ b/i18n/api/ja.json
@@ -2,9 +2,20 @@
 	"@metadata": {
 		"authors": [
 			"Otokoume",
-			"Sujiniku"
+			"Sujiniku",
+			"Omotecho"
 		]
 	},
+	"apihelp-languagesearch-description": "任意のスクリプトで言語を検索。",
+	"apihelp-languagesearch-summary": "任意のスクリプトで言語名を検索。",
 	"apihelp-languagesearch-param-search": "検索文字列。",
-	"apihelp-ulslocalization-param-language": "言語コード"
+	"apihelp-languagesearch-param-typos": "検索文字列で受容される間違った文字表記の数。",
+	"apihelp-languagesearch-example-1": "「Te」を検索",
+	"apihelp-languagesearch-example-2": "「ഫി」を検索",
+	"apihelp-languagesearch-example-3": "「ഫി」を検索、誤字は1つ以内",
+	"apihelp-ulslocalization-description": "ULSの当該言語訳を取得。",
+	"apihelp-ulslocalization-summary": "ULSの当該言語訳を取得。",
+	"apihelp-ulslocalization-param-language": "言語コード",
+	"apihelp-ulslocalization-example-1": "タミル語に翻訳",
+	"apihelp-ulslocalization-example-2": "ヒンディ語に翻訳"
 }