StreamingAssets フォルダーへのパスが含まれています（読み取り専用）
If you have a "StreamingAssets" folder in the Assets folder of your project, it will be
copied to your player builds and be present in the path given by
Application.streamingAssetsPath.
Note that on some platforms it is not possible to directly access the StreamingAssets folder
because there is no file system access in the web platforms, and because it is compressed
into the .apk file on Android. On those platforms, a url will be returned, which can be used
using the UnityWebRequest class.