diff --git a/frontend/pages/riichi/chap5.html b/frontend/pages/riichi/chap5.html
index f8242a7..2899168 100644
--- a/frontend/pages/riichi/chap5.html
+++ b/frontend/pages/riichi/chap5.html
@@ -51,7 +51,11 @@
     :root {
       --game_radius: 1100px;
     }
+
     #game-center {
+      position: absolute;
+      top: 0px;
+      left: 350px;
       display: flex;
       align-items: center;
       justify-content: center;