diff --git a/voicevox_engine/app/application.py b/voicevox_engine/app/application.py
index a3c57b6af..14fc89d21 100644
--- a/voicevox_engine/app/application.py
+++ b/voicevox_engine/app/application.py
@@ -94,9 +94,7 @@ def _get_core_characters(version: str | None) -> list[CoreCharacter]:
             generate_library_router(library_manager, verify_mutability_allowed)
         )
     app.include_router(generate_user_dict_router(user_dict, verify_mutability_allowed))
-    app.include_router(
-        generate_engine_info_router(core_version_list, tts_engines, engine_manifest)
-    )
+    app.include_router(generate_engine_info_router(core_version_list, engine_manifest))
     app.include_router(
         generate_setting_router(
             setting_loader, engine_manifest.brand_name, verify_mutability_allowed
diff --git a/voicevox_engine/app/routers/engine_info.py b/voicevox_engine/app/routers/engine_info.py
index caefe3e40..294d2591e 100644
--- a/voicevox_engine/app/routers/engine_info.py
+++ b/voicevox_engine/app/routers/engine_info.py
@@ -1,40 +1,13 @@
 """エンジンの情報機能を提供する API Router"""
 
-from typing import Self
-
-from fastapi import APIRouter, HTTPException
-from pydantic import BaseModel, Field
-from pydantic.json_schema import SkipJsonSchema
+from fastapi import APIRouter
 
 from voicevox_engine import __version__
-from voicevox_engine.core.core_adapter import DeviceSupport
 from voicevox_engine.engine_manifest import EngineManifest
-from voicevox_engine.tts_pipeline.tts_engine import LATEST_VERSION, TTSEngineManager
-
-
-class SupportedDevicesInfo(BaseModel):
-    """
-    対応しているデバイスの情報
-    """
-
-    cpu: bool = Field(description="CPUに対応しているか")
-    cuda: bool = Field(description="CUDA(Nvidia GPU)に対応しているか")
-    dml: bool = Field(description="DirectML(Nvidia GPU/Radeon GPU等)に対応しているか")
-
-    @classmethod
-    def generate_from(cls, device_support: DeviceSupport) -> Self:
-        """`DeviceSupport` インスタンスからこのインスタンスを生成する。"""
-        return cls(
-            cpu=device_support.cpu,
-            cuda=device_support.cuda,
-            dml=device_support.dml,
-        )
 
 
 def generate_engine_info_router(
-    core_version_list: list[str],
-    tts_engine_manager: TTSEngineManager,
-    engine_manifest_data: EngineManifest,
+    core_version_list: list[str], engine_manifest_data: EngineManifest
 ) -> APIRouter:
     """エンジン情報 API Router を生成する"""
     router = APIRouter(tags=["その他"])
@@ -49,17 +22,6 @@ async def core_versions() -> list[str]:
         """利用可能なコアのバージョン一覧を取得します。"""
         return core_version_list
 
-    @router.get("/supported_devices")
-    def supported_devices(
-        core_version: str | SkipJsonSchema[None] = None,
-    ) -> SupportedDevicesInfo:
-        """対応デバイスの一覧を取得します。"""
-        version = core_version or LATEST_VERSION
-        supported_devices = tts_engine_manager.get_engine(version).supported_devices
-        if supported_devices is None:
-            raise HTTPException(status_code=422, detail="非対応の機能です。")
-        return SupportedDevicesInfo.generate_from(supported_devices)
-
     @router.get("/engine_manifest")
     async def engine_manifest() -> EngineManifest:
         """エンジンマニフェストを取得します。"""
diff --git a/voicevox_engine/app/routers/tts_pipeline.py b/voicevox_engine/app/routers/tts_pipeline.py
index 6555c844c..989dd70c5 100644
--- a/voicevox_engine/app/routers/tts_pipeline.py
+++ b/voicevox_engine/app/routers/tts_pipeline.py
@@ -2,7 +2,7 @@
 
 import zipfile
 from tempfile import NamedTemporaryFile, TemporaryFile
-from typing import Annotated
+from typing import Annotated, Self
 
 import soundfile
 from fastapi import APIRouter, HTTPException, Query, Request
@@ -15,6 +15,7 @@
     CancellableEngine,
     CancellableEngineInternalError,
 )
+from voicevox_engine.core.core_adapter import DeviceSupport
 from voicevox_engine.metas.Metas import StyleId
 from voicevox_engine.model import AudioQuery
 from voicevox_engine.preset.preset_manager import (
@@ -63,6 +64,25 @@ def __init__(self, err: ParseKanaError):
         super().__init__(text=err.text, error_name=err.errname, error_args=err.kwargs)
 
 
+class SupportedDevicesInfo(BaseModel):
+    """
+    対応しているデバイスの情報
+    """
+
+    cpu: bool = Field(description="CPUに対応しているか")
+    cuda: bool = Field(description="CUDA(Nvidia GPU)に対応しているか")
+    dml: bool = Field(description="DirectML(Nvidia GPU/Radeon GPU等)に対応しているか")
+
+    @classmethod
+    def generate_from(cls, device_support: DeviceSupport) -> Self:
+        """`DeviceSupport` インスタンスからこのインスタンスを生成する。"""
+        return cls(
+            cpu=device_support.cpu,
+            cuda=device_support.cuda,
+            dml=device_support.dml,
+        )
+
+
 def generate_tts_pipeline_router(
     tts_engines: TTSEngineManager,
     preset_manager: PresetManager,
@@ -543,4 +563,15 @@ def is_initialized_speaker(
         engine = tts_engines.get_engine(version)
         return engine.is_synthesis_initialized(style_id)
 
+    @router.get("/supported_devices", tags=["その他"])
+    def supported_devices(
+        core_version: str | SkipJsonSchema[None] = None,
+    ) -> SupportedDevicesInfo:
+        """対応デバイスの一覧を取得します。"""
+        version = core_version or LATEST_VERSION
+        supported_devices = tts_engines.get_engine(version).supported_devices
+        if supported_devices is None:
+            raise HTTPException(status_code=422, detail="非対応の機能です。")
+        return SupportedDevicesInfo.generate_from(supported_devices)
+
     return router