diff --git a/Dockerfile b/Dockerfile
index b846f21..f7277e7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,2 +1,6 @@
 FROM nginx:alpine
 COPY nginx.conf /etc/nginx/nginx.conf
+COPY conf.d/ /etc/nginx/conf.d/
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+CMD ["/entrypoint.sh"]
diff --git a/entrypoint.sh b/entrypoint.sh
new file mode 100644
index 0000000..7fa4b25
--- /dev/null
+++ b/entrypoint.sh
@@ -0,0 +1,21 @@
+#!/bin/sh
+set -e
+
+if [ "$IS_PRODUCT" = "true" ]; then
+    cp /etc/nginx/conf.d/frontend.product.conf /etc/nginx/conf.d/frontend.conf
+    echo "nginx: production mode (static files from /var/www/html)"
+    i=0
+    while [ ! -f /var/www/html/index.html ]; do
+        i=$((i + 1))
+        if [ "$i" -gt 120 ]; then
+            echo "nginx: WARNING: /var/www/html/index.html not found after 240s"
+            break
+        fi
+        sleep 2
+    done
+else
+    cp /etc/nginx/conf.d/frontend.dev.conf /etc/nginx/conf.d/frontend.conf
+    echo "nginx: development mode (proxy to frontend:5173)"
+fi
+
+exec nginx -g 'daemon off;'
diff --git a/nginx.conf b/nginx.conf
index 8b8b021..bc77cae 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -12,14 +12,64 @@
         server backend:8000;
     }
 
-    upstream frontend {
-        server frontend:5173;
-    }
-
     server {
         listen 80;
         server_name _;
 
+        # CRM 法人番号インポート: 大容量アップロード・長時間処理（クエリは location 対象外）
+        location /api/plugins/crm/corporate-numbers/import {
+            client_max_body_size 2g;
+            client_body_timeout 1800s;
+            proxy_pass http://backend;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection $connection_upgrade;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+            proxy_connect_timeout 1800s;
+            proxy_send_timeout 1800s;
+            proxy_read_timeout 1800s;
+            send_timeout 1800s;
+        }
+
+        # CRM 郵便番号インポート: 最大 100MB・長時間処理（クエリは location 対象外）
+        location /api/plugins/crm/postal-codes/import {
+            client_max_body_size 100m;
+            client_body_timeout 1800s;
+            proxy_pass http://backend;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection $connection_upgrade;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+            proxy_connect_timeout 1800s;
+            proxy_send_timeout 1800s;
+            proxy_read_timeout 1800s;
+            send_timeout 1800s;
+        }
+
+        # CRM 請求書インポート: 最大 100MB・長時間処理（クエリは location 対象外）
+        location /api/plugins/crm/invoices/import {
+            client_max_body_size 100m;
+            client_body_timeout 1800s;
+            proxy_pass http://backend;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection $connection_upgrade;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+            proxy_connect_timeout 1800s;
+            proxy_send_timeout 1800s;
+            proxy_read_timeout 1800s;
+            send_timeout 1800s;
+        }
+
         location /api/ {
             proxy_pass http://backend;
             proxy_http_version 1.1;
@@ -56,15 +106,6 @@
             proxy_set_header X-Forwarded-Proto $scheme;
         }
 
-        location / {
-            proxy_pass http://frontend;
-            proxy_http_version 1.1;
-            proxy_set_header Upgrade $http_upgrade;
-            proxy_set_header Connection $connection_upgrade;
-            proxy_set_header Host $host;
-            proxy_set_header X-Real-IP $remote_addr;
-            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-            proxy_set_header X-Forwarded-Proto $scheme;
-        }
+        include /etc/nginx/conf.d/frontend.conf;
     }
 }