diff --git a/zenbu_izon/hd.h b/zenbu_izon/hd.h
index 7dfab9d..abe03bf 100644
--- a/zenbu_izon/hd.h
+++ b/zenbu_izon/hd.h
@@ -1,5 +1,5 @@
 //-------------------------------------------------------
 //◎hd.h
-#define SIZE 12
+#define SIZE 10