diff --git a/README.jp.md b/README.jp.md
index 1a4523c..e1babd9 100644
--- a/README.jp.md
+++ b/README.jp.md
@@ -14,6 +14,7 @@ git clone https://github.com/nkchocoai/ComfyUI-SaveImageWithMetaData.git
 ### Save Image With Metadata
 - 入力として受け取った `images` をメタデータ(PNGInfo)つきの画像として保存します。
 - メタデータは `sampler_selection_method` で見つけたKSamplerノードの入力と以前に実行されたノードの入力から取得します。
+  - 対象となるKSamplerノードは[py/defs/samplers.py](py/defs/samplers.py)と[py/defs/ext/](py/defs/ext/)配下のファイルの`SAMPLERS`のキーです。
 
 #### sampler_selection_method
 - このノードよりも前に実行されたKSamplerノードを選ぶ方法を指定します。
diff --git a/README.md b/README.md
index ea854c1..246d2a6 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@ git clone https://github.com/nkchocoai/ComfyUI-SaveImageWithMetaData.git
 ### Save Image With Metadata
 - Saves the `images` received as input as an image with metadata (PNGInfo).
 - Metadata is extracted from the input of the KSampler node found by `sampler_selection_method` and the input of the previously executed node.
+  - Target KSampler nodes are the key of `SAMPLERS` in the file [py/defs/samplers.py](py/defs/samplers.py) and the file in [py/defs/ext/](py/defs/ext/).
 
 #### sampler_selection_method
 - Specifies how to select a KSampler node that has been executed before this node.