diff --git a/web/workspace/deno.lock b/web/workspace/deno.lock
index 74d53571..f9c2ed9a 100644
--- a/web/workspace/deno.lock
+++ b/web/workspace/deno.lock
@@ -11,6 +11,7 @@
     "npm:cookie@0.6.0": "0.6.0",
     "npm:decodal-codemirror@0.1.2": "0.1.2",
     "npm:devalue@5.6.4": "5.6.4",
+    "npm:gen-interface-jp@0.8.0": "0.8.0",
     "npm:set-cookie-parser@2.7.2": "2.7.2",
     "npm:shiki@3.13.0": "3.13.0",
     "npm:sv@*": "0.10.8",
@@ -715,6 +716,9 @@
       "os": ["darwin"],
       "scripts": true
     },
+    "gen-interface-jp@0.8.0": {
+      "integrity": "sha512-7rIytSAfuugVjYithrQseT0zqeUIkJd0LY3Ugdfbk/FxzMSeagcskeZlof5uWJ5liW3Zhn7pdLHq2OIvAftx+A=="
+    },
     "graceful-fs@4.2.11": {
       "integrity": "sha512-RbJ5/jmFcNNCcDV5o9eTnBLJ/HszWV0P73bc+Ff4nS/rJj+YaS6IGyiOL0VoBYX+l1Wrl3k63h/KrH+nhJ0XvQ=="
     },
@@ -1182,6 +1186,7 @@
     "packageJson": {
       "dependencies": [
         "npm:@tailwindcss/vite@^4.1.17",
+        "npm:gen-interface-jp@0.8.0",
         "npm:tailwindcss@^4.1.17"
       ]
     }
diff --git a/web/workspace/package.json b/web/workspace/package.json
index e81f479e..79bba045 100644
--- a/web/workspace/package.json
+++ b/web/workspace/package.json
@@ -3,6 +3,9 @@
   "version": "0.0.0",
   "private": true,
   "type": "module",
+  "dependencies": {
+    "gen-interface-jp": "0.8.0"
+  },
   "devDependencies": {
     "@tailwindcss/vite": "^4.1.17",
     "tailwindcss": "^4.1.17"
diff --git a/web/workspace/src/app.css b/web/workspace/src/app.css
index 7043eddd..d00433bc 100644
--- a/web/workspace/src/app.css
+++ b/web/workspace/src/app.css
@@ -1,4 +1,8 @@
 @import 'tailwindcss';
+@import 'gen-interface-jp/400.css';
+@import 'gen-interface-jp/500.css';
+@import 'gen-interface-jp/600.css';
+@import 'gen-interface-jp/700.css';
 @layer reset, tokens, base, layout, components;
 @layer reset {
 	*,
@@ -52,7 +56,7 @@
 		--radius-panel: 12px;
 		--interactive-hover: oklch(94.5% 0 0);
 		--interactive-selected: oklch(93% 0.02 230);
-		--font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
+		--font-sans: "Gen Interface JP", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
             "Segoe UI", sans-serif;
 		--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
             "Liberation Mono", monospace;
diff --git a/web/workspace/src/lib/workspace/console/worker-console.ui.test.ts b/web/workspace/src/lib/workspace/console/worker-console.ui.test.ts
index 308c5e6f..23d409ee 100644
--- a/web/workspace/src/lib/workspace/console/worker-console.ui.test.ts
+++ b/web/workspace/src/lib/workspace/console/worker-console.ui.test.ts
@@ -9,6 +9,18 @@ function assert(condition: unknown, message: string): asserts condition {
   }
 }
 
+Deno.test("workspace app css uses bundled Gen Interface JP font", async () => {
+  const appCss = await Deno.readTextFile(new URL("./../../../app.css", import.meta.url));
+  assert(
+    appCss.includes("gen-interface-jp/400.css") &&
+      appCss.includes("gen-interface-jp/500.css") &&
+      appCss.includes("gen-interface-jp/600.css") &&
+      appCss.includes("gen-interface-jp/700.css") &&
+      appCss.includes('"Gen Interface JP", Inter'),
+    "global app css should import the tracked Gen Interface JP weights and prefer it in the sans font stack",
+  );
+});
+
 Deno.test("workspace Worker list lives on the dedicated Workers page", async () => {
   const workspacePage = await Deno.readTextFile(
     new URL("./../../../routes/w/[workspaceId]/+page.svelte", import.meta.url),