langfuse · jannikmaierhoefer · Apr 26, 2026 · Apr 14, 2026 · Apr 24, 2026 · Apr 24, 2026
diff --git a/.agents/cursor/rules/integration-page.mdc b/.agents/cursor/rules/integration-page.mdc
@@ -78,7 +78,7 @@ Each integration page should follow this specific structure:
     os.environ["LANGFUSE_SECRET_KEY"] = "sk-lf-..."
     os.environ["LANGFUSE_BASE_URL"] = "https://cloud.langfuse.com" # 🇪🇺 EU region
 
-    # os.environ["LANGFUSE_BASE_URL"] = "https://us.cloud.langfuse.com" # 🇺🇸 US region
+    # Other Langfuse data regions include 🇺🇸 US: https://us.cloud.langfuse.com, 🇯🇵 Japan: https://jp.cloud.langfuse.com and ⚕️ HIPAA: https://hipaa.cloud.langfuse.com
 
     # Get your Together.ai API key from the project settings page
 

diff --git a/app/cloud/[[...path]]/page.tsx b/app/cloud/[[...path]]/page.tsx
@@ -48,6 +48,13 @@ const regionCards: Record<
     icon: Globe,
     flag: "🇪🇺",
   },
+  jp: {
+    title: "Japan",
+    awsRegion: "ap-northeast-1",
+    awsLocation: "Tokyo",
+    icon: Globe,
+    flag: "🇯🇵",
+  },
 };
 
 const CLOUD_ROUTE_PREFIX = "/cloud";

diff --git a/components-mdx/env-js.mdx b/components-mdx/env-js.mdx
@@ -2,5 +2,5 @@
 LANGFUSE_SECRET_KEY = "sk-lf-..."
 LANGFUSE_PUBLIC_KEY = "pk-lf-..."
 LANGFUSE_BASE_URL = "https://cloud.langfuse.com" # 🇪🇺 EU region
-# LANGFUSE_BASE_URL = "https://us.cloud.langfuse.com" # 🇺🇸 US region
+# Other Langfuse data regions include 🇺🇸 US: https://us.cloud.langfuse.com, 🇯🇵 Japan: https://jp.cloud.langfuse.com and ⚕️ HIPAA: https://hipaa.cloud.langfuse.com
 ```
diff --git a/components-mdx/env-python-os.mdx b/components-mdx/env-python-os.mdx
@@ -4,5 +4,5 @@ import os
 os.environ["LANGFUSE_PUBLIC_KEY"] = "pk-lf-..." 
 os.environ["LANGFUSE_SECRET_KEY"] = "sk-lf-..." 
 os.environ["LANGFUSE_BASE_URL"] = "https://cloud.langfuse.com" # 🇪🇺 EU region
-# os.environ["LANGFUSE_BASE_URL"] = "https://us.cloud.langfuse.com" # 🇺🇸 US region
+# Other Langfuse data regions include 🇺🇸 US: https://us.cloud.langfuse.com, 🇯🇵 Japan: https://jp.cloud.langfuse.com and ⚕️ HIPAA: https://hipaa.cloud.langfuse.com
 ```
diff --git a/components-mdx/env-python.mdx b/components-mdx/env-python.mdx
@@ -2,5 +2,5 @@
 LANGFUSE_SECRET_KEY = "sk-lf-..."
 LANGFUSE_PUBLIC_KEY = "pk-lf-..."
 LANGFUSE_BASE_URL = "https://cloud.langfuse.com" # 🇪🇺 EU region
-# LANGFUSE_BASE_URL = "https://us.cloud.langfuse.com" # 🇺🇸 US region
+# Other Langfuse data regions include 🇺🇸 US: https://us.cloud.langfuse.com, 🇯🇵 Japan: https://jp.cloud.langfuse.com and ⚕️ HIPAA: https://hipaa.cloud.langfuse.com
 ```
diff --git a/components-mdx/get-started-langchain-python-constructor-args.mdx b/components-mdx/get-started-langchain-python-constructor-args.mdx
@@ -9,7 +9,7 @@ langfuse_handler = CallbackHandler(
     secret_key="sk-lf-...",
     public_key="pk-lf-...",
     base_url="https://cloud.langfuse.com", # 🇪🇺 EU region
-  # base_url="https://us.cloud.langfuse.com", # 🇺🇸 US region
+  # Other Langfuse data regions include 🇺🇸 US: https://us.cloud.langfuse.com, 🇯🇵 Japan: https://jp.cloud.langfuse.com and ⚕️ HIPAA: https://hipaa.cloud.langfuse.com
 )
 
 # Your Langchain code

diff --git a/components-mdx/prompt-linking.mdx b/components-mdx/prompt-linking.mdx
@@ -255,7 +255,7 @@ const langfuseHandler = new CallbackHandler({
   secretKey: "sk-lf-...",
   publicKey: "pk-lf-...",
   baseUrl: "https://cloud.langfuse.com", // 🇪🇺 EU region
-  // baseUrl: "https://us.cloud.langfuse.com", // 🇺🇸 US region
+  // Other Langfuse data regions include 🇺🇸 US: https://us.cloud.langfuse.com, 🇯🇵 Japan: https://jp.cloud.langfuse.com and ⚕️ HIPAA: https://hipaa.cloud.langfuse.com
 });
 
 const langfuse = new Langfuse();

diff --git a/components/ToAppButton.tsx b/components/ToAppButton.tsx
@@ -7,11 +7,14 @@ import {
   DropdownMenu,
   DropdownMenuContent,
   DropdownMenuItem,
+  DropdownMenuLabel,
+  DropdownMenuSeparator,
   DropdownMenuTrigger,
 } from "./ui/dropdown-menu";
 import { cn } from "@/lib/utils";
 import {
   cloudRegions,
+  cloudRegionSelectorOrder,
   continentHostMapping,
   type CloudRegionKey,
 } from "@/lib/cloud-regions";
@@ -55,7 +58,6 @@ export const ToAppButton = ({
           }
         })
         .catch((error) => {
-          // Only update state if the error is not from aborting
           if (error.name !== "AbortError") {
             setContinentCode(null);
           }
@@ -69,7 +71,14 @@ export const ToAppButton = ({
 
   const signedInCount = Object.values(signedInRegions).filter(Boolean).length;
 
-  if (signedInCount > 1) {
+  if (signedInCount >= 1) {
+    const signedInRegionKeys = cloudRegionSelectorOrder.filter(
+      (key) => signedInRegions[key]
+    );
+    const otherRegionKeys = cloudRegionSelectorOrder.filter(
+      (key) => !signedInRegions[key]
+    );
+
     return (
       <DropdownMenu>
         <DropdownMenuTrigger asChild>
@@ -84,59 +93,58 @@ export const ToAppButton = ({
             <span className="hidden sm:inline">{signedInText}</span>
           </Button>
         </DropdownMenuTrigger>
-        <DropdownMenuContent>
-          {Object.entries(cloudRegions).map(
-            ([key, region]) =>
-              signedInRegions[key as CloudRegionKey] && (
-                <DropdownMenuItem asChild key={key}>
-                  <Link href={region.url}>{region.label}</Link>
-                </DropdownMenuItem>
-              )
+        <DropdownMenuContent align="end">
+          {signedInRegionKeys.length > 0 && (
+            <DropdownMenuLabel className="text-xs font-medium text-muted-foreground">
+              Signed in
+            </DropdownMenuLabel>
+          )}
+          {signedInRegionKeys.map((key) => (
+            <DropdownMenuItem asChild key={key}>
+              <Link href={cloudRegions[key].url}>
+                {cloudRegions[key].label}
+              </Link>
+            </DropdownMenuItem>
+          ))}
+          {signedInRegionKeys.length > 0 && otherRegionKeys.length > 0 && (
+            <DropdownMenuSeparator />
           )}
+          {otherRegionKeys.length > 0 && (
+            <DropdownMenuLabel className="text-xs font-medium text-muted-foreground">
+              Other regions
+            </DropdownMenuLabel>
+          )}
+          {otherRegionKeys.map((key) => (
+            <DropdownMenuItem asChild key={key}>
+              <Link href={cloudRegions[key].url}>
+                {cloudRegions[key].label}
+              </Link>
+            </DropdownMenuItem>
+          ))}
         </DropdownMenuContent>
       </DropdownMenu>
     );
-  } else if (signedInCount === 1) {
-    const signedInRegion = Object.entries(cloudRegions).find(
-      ([key]) => signedInRegions[key as CloudRegionKey]
-    );
+  }
 
-    return (
-      <Button
-        size="xs"
-        asChild
-        className={cn(
-          "whitespace-nowrap",
-          isUsingDefaultText && "w-[45px] sm:w-[70px]"
-        )}
-      >
-        <Link href={signedInRegion![1].url}>
-          <span className="sm:hidden">{dropdownText}</span>
-          <span className="hidden sm:inline">{signedInText}</span>
-        </Link>
-      </Button>
-    );
-  } else {
-    return (
-      <Button
-        size="xs"
-        asChild
-        className={cn(
-          "whitespace-nowrap",
-          isUsingDefaultText && "w-[45px] sm:w-[70px]"
-        )}
+  return (
+    <Button
+      size="xs"
+      asChild
+      className={cn(
+        "whitespace-nowrap",
+        isUsingDefaultText && "w-[45px] sm:w-[70px]"
+      )}
+    >
+      <Link
+        href={
+          continentCode
+            ? continentHostMapping[continentCode]
+            : cloudRegions.eu.url
+        }
       >
-        <Link
-          href={
-            continentCode
-              ? continentHostMapping[continentCode]
-              : cloudRegions.eu.url
-          }
-        >
-          <span className="sm:hidden">{dropdownText}</span>
-          <span className="hidden sm:inline">{signUpText}</span>
-        </Link>
-      </Button>
-    );
-  }
+        <span className="sm:hidden">{dropdownText}</span>
+        <span className="hidden sm:inline">{signUpText}</span>
+      </Link>
+    </Button>
+  );
 };
diff --git a/content/blog/2024-05-haystack-integration.mdx b/content/blog/2024-05-haystack-integration.mdx
@@ -76,7 +76,7 @@ import os
 os.environ["LANGFUSE_PUBLIC_KEY"] = "pk-lf-..."
 os.environ["LANGFUSE_SECRET_KEY"] = "sk-lf-..."
 os.environ["LANGFUSE_BASE_URL"] = "https://cloud.langfuse.com" # 🇪🇺 EU region
-# os.environ["LANGFUSE_BASE_URL"] = "https://us.cloud.langfuse.com" # 🇺🇸 US region
+# Other Langfuse data regions include 🇺🇸 US: https://us.cloud.langfuse.com, 🇯🇵 Japan: https://jp.cloud.langfuse.com and ⚕️ HIPAA: https://hipaa.cloud.langfuse.com
 os.environ["HAYSTACK_CONTENT_TRACING_ENABLED"] = "True"
 
 # Your openai key

diff --git a/content/changelog/2025-03-03-langfuse-java-client.mdx b/content/changelog/2025-03-03-langfuse-java-client.mdx
@@ -40,7 +40,10 @@ import com.langfuse.client.resources.prompts.types.PromptMetaListResponse;
 
 LangfuseClient client = LangfuseClient.builder()
         .url("https://cloud.langfuse.com") // 🇪🇺 EU data region
-        // .url("https://us.cloud.langfuse.com") // 🇺🇸 US data region
+        // Other Langfuse data regions:
+        // .url("https://us.cloud.langfuse.com") // 🇺🇸 US
+        // .url("https://jp.cloud.langfuse.com") // 🇯🇵 Japan
+        // .url("https://hipaa.cloud.langfuse.com") // ⚕️ HIPAA
         // .url("http://localhost:3000") // 🏠 Local deployment
         .credentials("pk-lf-...", "sk-lf-...")
         .build();

diff --git a/content/docs/administration/authentication-and-sso.mdx b/content/docs/administration/authentication-and-sso.mdx
@@ -108,7 +108,7 @@ Details:
 
 Share the following with Langfuse via [support](/support):
 
-- **Instance URL** (e.g., `https://cloud.langfuse.com` or `https://us.cloud.langfuse.com`)
+- **Instance URL** (e.g., `https://cloud.langfuse.com`, `https://us.cloud.langfuse.com`, `https://jp.cloud.langfuse.com`, or `https://hipaa.cloud.langfuse.com`)
 - **Issuer URL** (e.g., `https://example.okta.com`)
 - **Client ID**
 - **Client Secret**

diff --git a/content/docs/api-and-data-platform/features/mcp-server.mdx b/content/docs/api-and-data-platform/features/mcp-server.mdx
@@ -28,7 +28,7 @@ Alternatively you can also work with the [Langfuse Agent Skill](/docs/api-and-da
 
 The Langfuse MCP server uses a stateless architecture where each API key is scoped to a specific project. Use the following configuration to connect to the MCP server:
 
-<Tabs items={["Cloud EU", "Cloud US", "HIPAA US", "Self-Hosted"]}>
+<Tabs items={["Cloud EU", "Cloud US", "Cloud Japan", "HIPAA US", "Self-Hosted"]}>
 
 <Tab>
 
@@ -48,6 +48,14 @@ The Langfuse MCP server uses a stateless architecture where each API key is scop
 
 <Tab>
 
+- Endpoint: `https://jp.cloud.langfuse.com/api/public/mcp`
+- Transport: `streamableHttp`
+- Authentication: Basic Auth via authorization header
+
+</Tab>
+
+<Tab>
+
 - Endpoint: `https://hipaa.cloud.langfuse.com/api/public/mcp`
 - Transport: `streamableHttp`
 - Authentication: Basic Auth via authorization header
@@ -138,6 +146,10 @@ The MCP server provides five tools for comprehensive prompt management.
    claude mcp add --transport http langfuse https://us.cloud.langfuse.com/api/public/mcp \
        --header "Authorization: Basic {your-base64-token}"
 
+   # Langfuse Cloud (Japan)
+   claude mcp add --transport http langfuse https://jp.cloud.langfuse.com/api/public/mcp \
+       --header "Authorization: Basic {your-base64-token}"
+
    # Langfuse Cloud (HIPAA)
    claude mcp add --transport http langfuse https://hipaa.cloud.langfuse.com/api/public/mcp \
        --header "Authorization: Basic {your-base64-token}"
@@ -162,7 +174,7 @@ The MCP server provides five tools for comprehensive prompt management.
 3. Click **"Add Custom MCP"**
 4. Add your Langfuse MCP server configuration, replace `{your-base64-token}` with your encoded credentials:
 
-<Tabs items={["Cloud EU", "Cloud US", "HIPAA US", "Self-Hosted"]}>
+<Tabs items={["Cloud EU", "Cloud US", "Cloud Japan", "HIPAA US", "Self-Hosted"]}>
 
 <Tab>
 
@@ -202,6 +214,24 @@ The MCP server provides five tools for comprehensive prompt management.
 </Tab>
 <Tab>
 
+```json filename="mcp.json" /{your-base64-token}/
+{
+  "mcp": {
+    "servers": {
+      "langfuse": {
+        "url": "https://jp.cloud.langfuse.com/api/public/mcp",
+        "headers": {
+          "Authorization": "Basic {your-base64-token}"
+        }
+      }
+    }
+  }
+}
+```
+
+</Tab>
+<Tab>
+
 ```json filename="mcp.json" /{your-base64-token}/
 {
   "mcp": {
@@ -248,6 +278,7 @@ The MCP server provides five tools for comprehensive prompt management.
 - Endpoint: `/api/public/mcp`
   - EU: `https://cloud.langfuse.com/api/public/mcp`
   - US: `https://us.cloud.langfuse.com/api/public/mcp`
+  - Japan: `https://jp.cloud.langfuse.com/api/public/mcp`
   - HIPAA: `https://hipaa.cloud.langfuse.com/api/public/mcp`
   - Self-Hosted: `https://your-domain.com/api/public/mcp`
 - Transport: `streamableHttp`

diff --git a/content/docs/api-and-data-platform/features/public-api.mdx b/content/docs/api-and-data-platform/features/public-api.mdx
@@ -8,7 +8,7 @@ description: All Langfuse data and features are available via the API. Follow th
 
 Langfuse is open and meant to be extended via custom workflows and integrations. All Langfuse data and features are available via the API.
 
-<Tabs items={["Path", "Cloud US", "Cloud EU", "HIPAA US"]}>
+<Tabs items={["Path", "Cloud US", "Cloud EU", "Cloud Japan", "HIPAA US"]}>
 
 <Tab>
 
@@ -33,6 +33,13 @@ https://cloud.langfuse.com/api/public
 </Tab>
 <Tab>
 
+```
+https://jp.cloud.langfuse.com/api/public
+```
+
+</Tab>
+<Tab>
+
 ```
 https://hipaa.cloud.langfuse.com/api/public
 ```
@@ -160,7 +167,10 @@ import com.langfuse.client.core.LangfuseClientApiException;
 
 LangfuseClient client = LangfuseClient.builder()
   .url("https://cloud.langfuse.com") // 🇪🇺 EU data region
-  // .url("https://us.cloud.langfuse.com") // 🇺🇸 US data region
+  // Other Langfuse data regions:
+  // .url("https://us.cloud.langfuse.com") // 🇺🇸 US
+  // .url("https://jp.cloud.langfuse.com") // 🇯🇵 Japan
+  // .url("https://hipaa.cloud.langfuse.com") // ⚕️ HIPAA
   // .url("http://localhost:3000") // 🏠 Local deployment
   .credentials("pk-lf-...", "sk-lf-...")
   .build();

diff --git a/content/docs/observability/sdk/overview.mdx b/content/docs/observability/sdk/overview.mdx
@@ -251,7 +251,7 @@ langfuse = Langfuse(
   public_key="your-public-key",
   secret_key="your-secret-key",
   base_url="https://cloud.langfuse.com", # 🇪🇺 EU region
-  # base_url="https://us.cloud.langfuse.com", # 🇺🇸 US region
+  # Other Langfuse data regions include 🇺🇸 US: https://us.cloud.langfuse.com, 🇯🇵 Japan: https://jp.cloud.langfuse.com and ⚕️ HIPAA: https://hipaa.cloud.langfuse.com
 )
 ```
 

diff --git a/content/faq/all/chatbot-analytics.mdx b/content/faq/all/chatbot-analytics.mdx
@@ -150,8 +150,7 @@ LANGFUSE_SECRET_KEY="sk-lf-..."
 LANGFUSE_PUBLIC_KEY="pk-lf-..."
 # 🇪🇺 EU region
 LANGFUSE_BASE_URL="https://cloud.langfuse.com"
-# 🇺🇸 US region
-# LANGFUSE_BASE_URL="https://us.cloud.langfuse.com"
+# Other Langfuse data regions include 🇺🇸 US: https://us.cloud.langfuse.com, 🇯🇵 Japan: https://jp.cloud.langfuse.com and ⚕️ HIPAA: https://hipaa.cloud.langfuse.com
 ```
 
 ```python

diff --git a/content/faq/all/existing-otel-setup.mdx b/content/faq/all/existing-otel-setup.mdx
@@ -664,7 +664,7 @@ OTEL_EXPORTER_OTLP_ENDPOINT="https://cloud.langfuse.com/api/public/otel"
 OTEL_EXPORTER_OTLP_HEADERS="Authorization=Basic $(echo -n 'pk-xxx:sk-xxx' | base64),x-langfuse-ingestion-version=4"
 ```
 
-For US region, use `https://us.cloud.langfuse.com/api/public/otel` as the endpoint.
+For other regions, replace the endpoint host accordingly: `https://us.cloud.langfuse.com/api/public/otel` (US), `https://jp.cloud.langfuse.com/api/public/otel` (Japan), or `https://hipaa.cloud.langfuse.com/api/public/otel` (HIPAA).
 
 This applies regardless of which framework (LangChain, LlamaIndex, Strands, etc.) you use on AgentCore.
 

diff --git a/content/faq/all/fifteen-questions-langfuse-answered.mdx b/content/faq/all/fifteen-questions-langfuse-answered.mdx
@@ -97,7 +97,7 @@ The answer is yes, Langfuse is an open source alternative to Promptlayer. You ca
 
 ## 14. How can I use the LLM Playground?
 
-**You can use the LLM Playground on [Langfuse Cloud](https://us.cloud.langfuse.com).** You will need to add LLM API keys to your project's settings before you are able to start using the [Prompt Playground](/docs/playground).
+**You can use the LLM Playground on [Langfuse Cloud](https://langfuse.com/cloud).** You will need to add LLM API keys to your project's settings before you are able to start using the [Prompt Playground](/docs/playground).
 
 ## 15. How can I use RAGAS evaluations?