diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..92a095e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,61 @@
+# === Node / Next.js build artifacts ===
+node_modules/
+.next/
+out/
+build/
+dist/
+
+# === PM2 / logs / runtime ===
+pm2.log
+pids/
+logs/
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# === Environment files ===
+.env
+.env.local
+.env.development
+.env.production
+.env.test
+.env*.bak
+
+# === OS / Editor / Misc ===
+.DS_Store
+Thumbs.db
+*.swp
+*.swo
+*.tmp
+*.bak
+*.old
+
+# === TypeScript / build metadata ===
+*.tsbuildinfo
+next-env.d.ts
+
+# === Prisma / database ===
+/src/generated/prisma/
+prisma/migrations/
+*.db
+
+# === Vercel / deployment ===
+.vercel/
+.vscode/
+.idea/
+*.pem
+*.key
+
+# === Backup / temp ===
+backup/
+tmp/
+temp/
+.cache/
+coverage/
+
+# === Directus CMS (別サーバ管理のため) ===
+cms/
+directus/
+*.sqlite