diff --git a/src/main/java/com/ntlab/irisserver/entities/Cell.java b/src/main/java/com/ntlab/irisserver/entities/Cell.java
index ac6b408..1e4cdc2 100644
--- a/src/main/java/com/ntlab/irisserver/entities/Cell.java
+++ b/src/main/java/com/ntlab/irisserver/entities/Cell.java
@@ -5,7 +5,7 @@
 public class Cell {
 
     @JsonProperty("isOpen")
-    private boolean isOpen;
+    private boolean isOpen; //trueが空いてる、falseは空いてない
 
     @JsonProperty("color")
     public String color;