diff --git a/src/components/timetable/index.astro b/src/components/timetable/index.astro
index b09825a..a90dc92 100644
--- a/src/components/timetable/index.astro
+++ b/src/components/timetable/index.astro
@@ -393,8 +393,8 @@ const schedules = [
     grid-template-columns: 97px repeat(2, 1fr);
     /* スポンサーは3枠。その直後の 150px は休憩後余白 */
     grid-template-rows:
-      90px repeat(2, 300px) repeat(5, 150px)
-      114px 36px 114px repeat(2, 150px) 300px 150px repeat(2, 90px);
+      90px 90px repeat(2, 300px) repeat(5, 150px)
+      114px 36px 114px repeat(2, 150px) 300px 150px repeat(3, 90px);
     column-gap: 8px;
     row-gap: 8px;
   }
@@ -410,6 +410,7 @@ const schedules = [
     min-height: 0;
   }
 
+  /* 09:30 開場 */
   .grid-item-1 {
     grid-area: 1 / 1 / 2 / 2;
   }
@@ -435,112 +436,128 @@ const schedules = [
   }
 
   .grid-item-7 {
-    grid-area: 3 / 3 / 4 / 4;
+    grid-area: 4 / 1 / 5 / 2;
   }
 
   .grid-item-8 {
-    grid-area: 4 / 1 / 5 / 2;
+    grid-area: 4 / 2 / 5 / 3;
   }
 
   .grid-item-9 {
-    grid-area: 4 / 2 / 5 / 3;
+    grid-area: 4 / 3 / 5 / 4;
   }
 
   .grid-item-10 {
-    grid-area: 4 / 3 / 8 / 4;
+    grid-area: 5 / 1 / 6 / 2;
   }
 
   .grid-item-11 {
-    grid-area: 5 / 1 / 6 / 2;
+    grid-area: 5 / 2 / 6 / 3;
   }
 
   .grid-item-12 {
-    grid-area: 5 / 2 / 6 / 3;
+    grid-area: 5 / 3 / 9 / 4;
   }
 
   .grid-item-13 {
-    grid-area: 6 / 1 / 8 / 2;
+    grid-area: 6 / 1 / 7 / 2;
   }
 
   .grid-item-14 {
     grid-area: 6 / 2 / 7 / 3;
   }
 
-  /* 14:00〜 — row 7 は休憩後余白（150px） */
   .grid-item-15 {
-    grid-area: 8 / 1 / 10 / 2;
+    grid-area: 7 / 1 / 9 / 2;
   }
 
   .grid-item-16 {
-    grid-area: 8 / 2 / 11 / 3;
+    grid-area: 7 / 2 / 8 / 3;
   }
 
+  /* 14:00〜 — row 8 は休憩後余白（150px） */
   .grid-item-17 {
-    grid-area: 8 / 3 / 9 / 4;
+    grid-area: 9 / 1 / 11 / 2;
   }
 
   .grid-item-18 {
-    grid-area: 10 / 1 / 12 / 2;
+    grid-area: 9 / 2 / 12 / 3;
   }
 
   .grid-item-19 {
-    grid-area: 10 / 3 / 12 / 4;
+    grid-area: 9 / 3 / 10 / 4;
   }
 
   .grid-item-20 {
-    grid-area: 12 / 1 / 13 / 2;
+    grid-area: 11 / 1 / 13 / 2;
   }
 
   .grid-item-21 {
-    grid-area: 12 / 2 / 13 / 3;
+    grid-area: 11 / 3 / 13 / 4;
   }
 
   .grid-item-22 {
-    grid-area: 12 / 3 / 13 / 4;
+    grid-area: 13 / 1 / 14 / 2;
   }
 
   .grid-item-23 {
-    grid-area: 13 / 1 / 14 / 2;
+    grid-area: 13 / 2 / 14 / 3;
   }
 
   .grid-item-24 {
-    grid-area: 13 / 2 / 14 / 3;
+    grid-area: 13 / 3 / 14 / 4;
   }
 
   .grid-item-25 {
-    grid-area: 13 / 3 / 14 / 4;
+    grid-area: 14 / 1 / 15 / 2;
   }
 
   .grid-item-26 {
-    grid-area: 14 / 1 / 15 / 2;
+    grid-area: 14 / 2 / 15 / 3;
   }
 
   .grid-item-27 {
-    grid-area: 14 / 2 / 15 / 3;
+    grid-area: 14 / 3 / 15 / 4;
   }
 
   .grid-item-28 {
-    grid-area: 14 / 3 / 15 / 4;
+    grid-area: 15 / 1 / 16 / 2;
   }
 
   .grid-item-29 {
-    grid-area: 15 / 1 / 16 / 2;
+    grid-area: 15 / 2 / 16 / 3;
   }
 
   .grid-item-30 {
-    grid-area: 15 / 2 / 16 / 3;
+    grid-area: 15 / 3 / 16 / 4;
   }
 
   .grid-item-31 {
-    grid-area: 15 / 3 / 16 / 4;
+    grid-area: 16 / 1 / 17 / 2;
   }
 
   .grid-item-32 {
-    grid-area: 16 / 1 / 17 / 2;
+    grid-area: 16 / 2 / 17 / 3;
   }
 
   .grid-item-33 {
-    grid-area: 16 / 2 / 17 / 3;
+    grid-area: 16 / 3 / 17 / 4;
+  }
+
+  .grid-item-34 {
+    grid-area: 17 / 1 / 18 / 2;
+  }
+
+  .grid-item-35 {
+    grid-area: 17 / 2 / 18 / 3;
+  }
+
+  .grid-item-36 {
+    grid-area: 18 / 1 / 19 / 2;
+  }
+
+  .grid-item-37 {
+    grid-area: 18 / 2 / 19 / 3;
   }
 
   @media screen and (max-width: 768px) {
diff --git a/src/components/timetable/program.ts b/src/components/timetable/program.ts
index b6be5de..1155ecf 100644
--- a/src/components/timetable/program.ts
+++ b/src/components/timetable/program.ts
@@ -61,6 +61,11 @@ export type ProgramSessionCommon = {
 import { parseProgramsFromRawData } from "./parseRawData";
 
 const organizerPrograms = {
+  open: {
+    type: "organizer",
+    timeString: "09:30",
+    title: "開場",
+  },
   opening: {
     type: "organizer",
     timeString: "10:15 - 10:20",
@@ -77,6 +82,11 @@ const organizerPrograms = {
     title: "お昼休憩",
     spHeight: "150px",
   },
+  afterParty: {
+    type: "organizer",
+    timeString: "18:30 - 20:00",
+    title: "After Party",
+  },
 } as const satisfies Record<string, ProgramOrganizer>;
 
 /** 未入力時のみ使う基調講演プレースホルダー（セッションカードと同じ見た目） */
diff --git a/src/components/timetable/sessionGrid.ts b/src/components/timetable/sessionGrid.ts
index c172707..ee45f01 100644
--- a/src/components/timetable/sessionGrid.ts
+++ b/src/components/timetable/sessionGrid.ts
@@ -18,180 +18,200 @@ export type SessionGridCell =
     };
 
 /**
- * CSS Grid（grid-item-1…33）への内容割り当て。
- * スポンサーは 3 枠。row 7（150px）は休憩後の余白。
+ * CSS Grid（grid-item-1…35）への内容割り当て。
+ * スポンサーは 3 枠。row 8（150px）は休憩後の余白。
  */
 export const sessionGridCells: SessionGridCell[] = [
+  // 09:30 開場
+  { type: "time", startTime: "09：30", gridItem: 1 },
+  {
+    type: "card",
+    programId: "open",
+    room: "roomA",
+    gridItem: 2,
+    startTime: "09：30",
+  },
+
   // 10:15
-  { type: "time", startTime: "10：15", gridItem: 1 },
+  { type: "time", startTime: "10：15", gridItem: 3 },
   {
     type: "card",
     programId: "opening",
     room: "roomA",
-    gridItem: 2,
+    gridItem: 4,
     startTime: "10：15",
   },
 
   // 10:30 基調講演
-  { type: "time", startTime: "10：30", gridItem: 3 },
+  { type: "time", startTime: "10：30", gridItem: 5 },
   {
     type: "card",
     programId: "keynote",
     room: "roomA",
-    gridItem: 4,
+    gridItem: 6,
     startTime: "10：30",
   },
 
   // 11:25
-  { type: "time", startTime: "11：25", gridItem: 5 },
+  { type: "time", startTime: "11：25", gridItem: 7 },
   {
     type: "card",
     programId: "1251905",
     room: "roomA",
-    gridItem: 6,
+    gridItem: 8,
     startTime: "11：25",
   },
   {
     type: "card",
     programId: "1251920",
     room: "roomB",
-    gridItem: 7,
+    gridItem: 9,
     startTime: "11：25",
   },
 
   // 12:20〜13:10 スポンサー + お昼休憩
-  { type: "time", startTime: "12：20", gridItem: 8 },
+  { type: "time", startTime: "12：20", gridItem: 10 },
   {
     type: "card",
     programId: "sponsorSlot1",
     room: "roomA",
-    gridItem: 9,
+    gridItem: 11,
     startTime: "12：20",
   },
   {
     type: "card",
     programId: "lunch",
     room: "roomB",
-    gridItem: 10,
+    gridItem: 12,
     startTime: "12：05",
   },
-  { type: "time", startTime: "12：45", gridItem: 11 },
+  { type: "time", startTime: "12：45", gridItem: 13 },
   {
     type: "card",
     programId: "sponsorSlot2",
     room: "roomA",
-    gridItem: 12,
+    gridItem: 14,
     startTime: "12：45",
   },
-  { type: "time", startTime: "13：10", gridItem: 13 },
+  { type: "time", startTime: "13：10", gridItem: 15 },
   {
     type: "card",
     programId: "sponsorSlot3",
     room: "roomA",
-    gridItem: 14,
+    gridItem: 16,
     startTime: "13：10",
   },
 
   // 14:00（Room A ロング / Room B ショート×2）
-  { type: "time", startTime: "14：00", gridItem: 15 },
+  { type: "time", startTime: "14：00", gridItem: 17 },
   {
     type: "card",
     programId: "1264506",
     room: "roomA",
-    gridItem: 16,
+    gridItem: 18,
     startTime: "14：00",
   },
   {
     type: "card",
     programId: "1236917",
     room: "roomB",
-    gridItem: 17,
+    gridItem: 19,
     startTime: "14：00",
   },
-  { type: "time", startTime: "14：35", gridItem: 18 },
+  { type: "time", startTime: "14：35", gridItem: 20 },
   {
     type: "card",
     programId: "1237370",
     room: "roomB",
-    gridItem: 19,
+    gridItem: 21,
     startTime: "14：35",
   },
 
   // 15:05
-  { type: "time", startTime: "15：05", gridItem: 20 },
+  { type: "time", startTime: "15：05", gridItem: 22 },
   {
     type: "card",
     programId: "1264549",
     room: "roomA",
-    gridItem: 21,
+    gridItem: 23,
     startTime: "15：05",
   },
   {
     type: "card",
     programId: "1257333",
     room: "roomB",
-    gridItem: 22,
+    gridItem: 24,
     startTime: "15：05",
   },
 
   // 15:40
-  { type: "time", startTime: "15：40", gridItem: 23 },
+  { type: "time", startTime: "15：40", gridItem: 25 },
   {
     type: "card",
     programId: "1264524",
     room: "roomA",
-    gridItem: 24,
+    gridItem: 26,
     startTime: "15：40",
   },
   {
     type: "card",
     programId: "1263610",
     room: "roomB",
-    gridItem: 25,
+    gridItem: 27,
     startTime: "15：40",
   },
 
   // 16:25
-  { type: "time", startTime: "16：25", gridItem: 26 },
+  { type: "time", startTime: "16：25", gridItem: 28 },
   {
     type: "card",
     programId: "1263399",
     room: "roomA",
-    gridItem: 27,
+    gridItem: 29,
     startTime: "16：25",
   },
   {
     type: "card",
     programId: "1263912",
     room: "roomB",
-    gridItem: 28,
+    gridItem: 30,
     startTime: "16：25",
   },
 
   // 17:20
-  { type: "time", startTime: "17：20", gridItem: 29 },
+  { type: "time", startTime: "17：20", gridItem: 31 },
   {
     type: "card",
     programId: "1255534",
     room: "roomA",
-    gridItem: 30,
+    gridItem: 32,
     startTime: "17：20",
   },
   {
     type: "card",
     programId: "1264230",
     room: "roomB",
-    gridItem: 31,
+    gridItem: 33,
     startTime: "17：20",
   },
 
   // 17:45
-  { type: "time", startTime: "17：45", gridItem: 32 },
+  { type: "time", startTime: "17：45", gridItem: 34 },
   {
     type: "card",
     programId: "closing",
     room: "roomA",
-    gridItem: 33,
+    gridItem: 35,
     startTime: "17：45",
   },
+
+  // 18:30 After Party
+  { type: "time", startTime: "18：30", gridItem: 36 },
+  {
+    type: "card",
+    programId: "afterParty",
+    room: "roomA",
+    gridItem: 37,
+    startTime: "18：30",
+  },
 ];