diff --git a/model/src/main/java/one/nem/lacerta/model/document/DocumentMeta.java b/model/src/main/java/one/nem/lacerta/model/document/DocumentMeta.java
index aa2bcb97..c191fcde 100644
--- a/model/src/main/java/one/nem/lacerta/model/document/DocumentMeta.java
+++ b/model/src/main/java/one/nem/lacerta/model/document/DocumentMeta.java
@@ -58,11 +58,19 @@ public class DocumentMeta {
     public DocumentMeta(String id, String title) { // Without tags, updatedAt, createdAt
         this.id = id;
         this.title = title;
+        // 現在時刻を設定
+        this.updatedAt = new Date();
+        this.createdAt = new Date();
+        this.tags = new ArrayList<>();
     }
 
     public DocumentMeta(String title) { // title only
         this.id = UUID.randomUUID().toString(); // 新規作成時想定なのでコンストラクタで生成してしまう(使う人が楽なので)
         this.title = title;
+        // 現在時刻を設定
+        this.updatedAt = new Date();
+        this.createdAt = new Date();
+        this.tags = new ArrayList<>();
     }
 
     // Getter