diff --git a/src/exporters/stat.ink.ts b/src/exporters/stat.ink.ts
index 6dc9f71..8167364 100644
--- a/src/exporters/stat.ink.ts
+++ b/src/exporters/stat.ink.ts
@@ -36,6 +36,7 @@ import {
   b64Number,
   gameId,
   nonNullable,
+  s3sCoopGameId,
   s3siGameId,
   urlSimplify,
 } from "../utils.ts";
@@ -309,8 +310,12 @@ export class StatInkExporter implements GameExporter {
     for (const id of list) {
       const s3sId = await gameId(id);
       const s3siId = await s3siGameId(id);
+      const s3sCoopId = await s3sCoopGameId(id);
 
-      if (!uuid.includes(s3sId) && !uuid.includes(s3siId)) {
+      if (
+        !uuid.includes(s3sId) && !uuid.includes(s3siId) &&
+        !uuid.includes(s3sCoopId)
+      ) {
         out.push(id);
       }
     }
diff --git a/src/utils.test.ts b/src/utils.test.ts
index 6602390..16be848 100644
--- a/src/utils.test.ts
+++ b/src/utils.test.ts
@@ -1,6 +1,9 @@
 import { base64 } from "../deps.ts";
 import { assertEquals } from "../dev_deps.ts";
-import { gameId } from "./utils.ts";
+import { gameId, s3sCoopGameId } from "./utils.ts";
+
+const COOP_ID =
+  `CoopHistoryDetail-u-asdf:20220101T012345_12345678-abcd-1234-5678-0123456789ab`;
 
 Deno.test("gameId", async () => {
   assertEquals(
@@ -13,11 +16,12 @@ Deno.test("gameId", async () => {
   );
 
   assertEquals(
-    await gameId(
-      base64.encode(
-        `"CoopHistoryDetail-u-asdf:20220101T012345_12345678-abcd-1234-5678-0123456789ab`,
-      ),
-    ),
-    "175af427-e83b-5bac-b02c-9539cc1fd684",
+    await gameId(base64.encode(COOP_ID)),
+    "58329d62-737d-5b43-ac22-e35e6e44b077",
   );
 });
+
+Deno.test("s3sCoopGameId", async () => {
+  const S3S_COOP_UUID = "be4435b1-0ac5-577b-81bb-766585bec028";
+  assertEquals(await s3sCoopGameId(base64.encode(COOP_ID)), S3S_COOP_UUID);
+});
diff --git a/src/utils.ts b/src/utils.ts
index c224cfe..53dd34e 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -115,6 +115,18 @@ export function s3siGameId(id: string) {
   return uuid.v5.generate(S3SI_NAMESPACE, tsUuid);
 }
 
+/**
+ * https://github.com/spacemeowx2/s3si.ts/issues/45
+ *
+ * @param id id of CoopHistoryDetail
+ * @returns uuid used in stat.ink
+ */
+export function s3sCoopGameId(id: string) {
+  const fullId = base64.decode(id);
+  const tsUuid = fullId.slice(fullId.length - 52, fullId.length);
+  return uuid.v5.generate(COOP_NAMESPACE, tsUuid);
+}
+
 /**
  * @param id VsHistoryDetail id or CoopHistoryDetail id
  */