diff --git a/em-oop/src/BasicCheck1.java b/em-oop/src/BasicCheck1.java
index 7cb6a85..44bde40 100644
--- a/em-oop/src/BasicCheck1.java
+++ b/em-oop/src/BasicCheck1.java
@@ -10,6 +10,20 @@ public class BasicCheck1 {
 		System.out.println(book.title);
 		System.out.println(book.author);
 		System.out.println(book.price);
+
+		System.out.println();
+
+		//9/15段階１
+		Book book1 = new Book();
+		System.out.println(book1.title);
+		System.out.println(book1.author);
+		System.out.println(book1.price);
+
+		Book book2 = new Book("銀河鉄道の夜", "宮沢賢治", 500);
+		System.out.println(book2.title);
+		System.out.println(book2.author);
+		System.out.println(book2.price);
+
 	}
 
 }
diff --git a/em-oop/src/Book.java b/em-oop/src/Book.java
index 418f4a3..f072bfa 100644
--- a/em-oop/src/Book.java
+++ b/em-oop/src/Book.java
@@ -3,4 +3,18 @@ public class Book {
 	String title;
 	String author;
 	int price;
+
+	//コンストラクタ
+	public Book() {
+		title = "タイトル未設定";
+		author = "著者未設定";
+		price = 0;
+	}
+
+	//引数ありコンストラクタ
+	public Book(String title, String author, int price) {
+		this.title = title;
+		this.author = author;
+		this.price = price;
+	}
 }