diff --git a/apps/bff/package.json b/apps/bff/package.json
index ff907c92..c146facd 100644
--- a/apps/bff/package.json
+++ b/apps/bff/package.json
@@ -15,8 +15,8 @@
     "dev:build:watch": "tsc -p tsconfig.build.json --watch --preserveWatchOutput",
     "dev:alias": "tsc-alias -p tsconfig.build.json --resolve-full-paths",
     "dev:alias:watch": "tsc-alias -p tsconfig.build.json --resolve-full-paths -w",
-    "dev:run:watch": "node --watch dist/main.js",
-    "dev:run:debug:watch": "node --inspect --watch dist/main.js",
+    "dev:run:watch": "node --watch --watch-path=dist --watch-path=../../packages/domain/dist dist/main.js",
+    "dev:run:debug:watch": "node --inspect --watch --watch-path=dist --watch-path=../../packages/domain/dist dist/main.js",
     "start:debug": "BFF_NODE_RUN_SCRIPT=dev:run:debug:watch bash ./scripts/dev-watch.sh",
     "start:prod": "node dist/main.js",
     "lint": "eslint .",
diff --git a/apps/bff/src/integrations/japanpost/services/japanpost-address.service.ts b/apps/bff/src/integrations/japanpost/services/japanpost-address.service.ts
index 819e7928..3b352647 100644
--- a/apps/bff/src/integrations/japanpost/services/japanpost-address.service.ts
+++ b/apps/bff/src/integrations/japanpost/services/japanpost-address.service.ts
@@ -79,18 +79,25 @@ export class JapanPostAddressService {
         throw error;
       }
 
-      // Check if this is an HTTP error from connection layer (already logged there)
+      // Get raw error message for classification
+      const rawMessage = error instanceof Error ? error.message : String(error);
       const errorMessage = extractErrorMessage(error);
-      const isConnectionError = errorMessage.includes("HTTP") || errorMessage.includes("timed out");
+
+      // Check if this is an HTTP/connection error (already logged at connection layer)
+      const isConnectionError =
+        rawMessage.includes("HTTP") ||
+        rawMessage.includes("timed out") ||
+        rawMessage.includes("failed") ||
+        errorMessage.includes("HTTP") ||
+        errorMessage.includes("timed out");
 
       if (!isConnectionError) {
         // Only log unexpected errors (e.g., transformation failures)
-        this.logger.error("Address lookup failed at service layer", {
+        this.logger.error("Address lookup transformation error", {
           zipCode: normalizedZip,
           durationMs,
           errorType: error instanceof Error ? error.constructor.name : "Unknown",
           error: errorMessage,
-          stage: "response_transformation",
         });
       }
 
diff --git a/apps/portal/next.config.mjs b/apps/portal/next.config.mjs
index 5ebe63a0..018d5b77 100644
--- a/apps/portal/next.config.mjs
+++ b/apps/portal/next.config.mjs
@@ -23,11 +23,28 @@ const nextConfig = {
     },
   },
 
-  webpack(config) {
+  webpack(config, { dev }) {
     config.resolve.alias = {
       ...config.resolve.alias,
       "@customer-portal/domain": path.join(workspaceRoot, "packages/domain/dist"),
     };
+
+    // Watch domain package dist for changes in development
+    if (dev) {
+      config.watchOptions = {
+        ...config.watchOptions,
+        ignored: config.watchOptions?.ignored
+          ? [...(Array.isArray(config.watchOptions.ignored) ? config.watchOptions.ignored : [config.watchOptions.ignored])]
+              .filter(p => !String(p).includes("packages/domain"))
+          : ["**/node_modules/**"],
+      };
+      // Add domain dist to snapshot managed paths for better change detection
+      config.snapshot = {
+        ...config.snapshot,
+        managedPaths: [],
+      };
+    }
+
     return config;
   },