diff --git a/templates/containers/ecr.yml b/templates/containers/ecr.yml
index 2a51521..aaa42db 100644
--- a/templates/containers/ecr.yml
+++ b/templates/containers/ecr.yml
@@ -15,8 +15,8 @@ Metadata:
       - Label:
           default: 'ECR Configuration'
         Parameters:
-          - BackEndAppRepositorySuffix
-          - BackEndWebRepositorySuffix
+          - BackendAppRepositorySuffix
+          - BackendWebRepositorySuffix
 
 # -------------------------------------
 # Input parameters
@@ -36,11 +36,11 @@ Parameters:
       - stg
       - prd
     ConstraintDescription: 'Environment must be select.'
-  BackEndAppRepositorySuffix:
+  BackendAppRepositorySuffix:
     Description: 'Repository name suffix of the application container image. (ex: django)'
     Type: String
     Default: django
-  BackEndWebRepositorySuffix:
+  BackendWebRepositorySuffix:
     Description: 'Repository name suffix of the webserver container image. (ex: nginx)'
     Type: String
     Default: nginx
@@ -54,7 +54,7 @@ Resources:
     UpdateReplacePolicy: Retain
     Type: AWS::ECR::Repository
     Properties:
-      RepositoryName: !Sub ${ProjectName}/${Environment}/back/${BackEndAppRepositorySuffix}
+      RepositoryName: !Sub ${ProjectName}/${Environment}/back/${shun198}
       ImageScanningConfiguration:
         ScanOnPush: true
       ImageTagMutability: IMMUTABLE
@@ -68,7 +68,7 @@ Resources:
     UpdateReplacePolicy: Retain
     Type: AWS::ECR::Repository
     Properties:
-      RepositoryName: !Sub ${ProjectName}/${Environment}/back/${BackEndWebRepositorySuffix}
+      RepositoryName: !Sub ${ProjectName}/${Environment}/back/${BackendWebRepositorySuffix}
       ImageScanningConfiguration:
         ScanOnPush: true
       ImageTagMutability: IMMUTABLE
diff --git a/templates/environment/dev.yml b/templates/environment/dev.yml
index 34a99c5..2b89597 100644
--- a/templates/environment/dev.yml
+++ b/templates/environment/dev.yml
@@ -347,7 +347,7 @@ Parameters:
     Default: 2
     AllowedValues: [0, 1, 2]
   RDSDBName:
-    Description: "Enter the database name (ex: factor_flow_master_development)"
+    Description: "Enter the database name (ex: shun198_development)"
     Type: String
   RDSDBMasterUserName:
     Description: "Enter the master username (postgres)"
@@ -358,7 +358,7 @@ Parameters:
     AllowedPattern: "^[a-zA-Z][a-zA-Z_0-9]*"
     ConstraintDescription: "Must begin with a letter and contain only alphanumeric characters"
   RDSDBMasterUserPassword:
-    Description: "Enter the master password (postgres)"
+    Description: "Enter the master password (Postgres123)"
     Type: String
     NoEcho: true
     MinLength: 10
diff --git a/templates/logs/cloudwatch-logs-for-ecs.yml b/templates/logs/cloudwatch-logs-for-backend.yml
similarity index 56%
rename from templates/logs/cloudwatch-logs-for-ecs.yml
rename to templates/logs/cloudwatch-logs-for-backend.yml
index 75b2f2c..6151c84 100644
--- a/templates/logs/cloudwatch-logs-for-ecs.yml
+++ b/templates/logs/cloudwatch-logs-for-backend.yml
@@ -1,17 +1,6 @@
 AWSTemplateFormatVersion: 2010-09-09
 Description: "CloudWatch Logs Stack For Backend"
 
-# -------------------------------------
-# Mappings
-# -------------------------------------
-Mappings:
-  # ロググループの保持期間
-  RetentionInDaysMap:
-    Environment:
-      dev: 30
-      stg: 60
-      prd: 90
-
 # -------------------------------------
 # Metadata
 # -------------------------------------
@@ -25,35 +14,41 @@ Metadata:
           - ProjectName
           - Environment
       - Label:
-          default: "CloudWatch Logs Configuration for ECS"
+          default: "CloudWatch Logs Configuration for ECS Fargate"
         Parameters:
-          - AppLogGroupName
-          - WebLogGroupName
+          - BackendAppLogGroupName
+          - BackendWebLogGroupName
+          - LogRetentionInDays
 
 # -------------------------------------
-# Input parameters
+# Parameters
 # -------------------------------------
 Parameters:
   ProjectName:
     Description: "Enter the project name. (ex: shun198)"
     Type: String
     MinLength: 1
-    ConstraintDescription: "ProjectName must be enter."
+    ConstraintDescription: "ProjectName must be entered."
     Default: shun198
   Environment:
-    Description: "Select the environment."
+    Description: "Select the environment name."
     Type: String
     AllowedValues:
       - dev
       - stg
       - prd
-    ConstraintDescription: "Environment must be select."
-  AppLogGroupName:
-    Description: "CloudWatch Logs log-group name for application. (ex: /ecs/shun198/dev/back/django)"
+    ConstraintDescription: "Environment name must be selected."
+  BackendAppLogGroupName:
+    Description: "CloudWatch Logs log-group name for application. (ex: /ecs/shun198/<environment>/back/django)"
+    Type: String
+  BackendWebLogGroupName:
+    Description: "CloudWatch Logs log-group name for webserver. (ex: /ecs/shun198/<environment>/back/nginx)"
     Type: String
-  WebLogGroupName:
-    Description: "CloudWatch Logs log-group name for webserver. (ex: /ecs/shun198/dev/back/nginx)"
+  LogRetentionInDays:
+    Description: "Enter the data retention period."
     Type: String
+    Default: 30
+    AllowedValues: [30, 60, 90]
 
 # -------------------------------------
 # Resources
@@ -68,9 +63,8 @@ Resources:
     UpdateReplacePolicy: Retain
     Type: AWS::Logs::LogGroup
     Properties:
-      LogGroupName: !Ref AppLogGroupName
-      RetentionInDays:
-        !FindInMap [RetentionInDaysMap, Environment, !Ref Environment]
+      LogGroupName: !Ref BackendAppLogGroupName
+      RetentionInDays: !Ref LogRetentionInDays
       Tags:
         - Key: ProjectName
           Value: !Ref ProjectName
@@ -82,11 +76,25 @@ Resources:
     UpdateReplacePolicy: Retain
     Type: AWS::Logs::LogGroup
     Properties:
-      LogGroupName: !Ref WebLogGroupName
-      RetentionInDays:
-        !FindInMap [RetentionInDaysMap, Environment, !Ref Environment]
+      LogGroupName: !Ref BackendWebLogGroupName
+      RetentionInDays: !Ref LogRetentionInDays
       Tags:
         - Key: ProjectName
           Value: !Ref ProjectName
         - Key: Environment
           Value: !Ref Environment
+
+  # -------------------------------------
+  # Metric Filter
+  # -------------------------------------
+  ErrorInBackendWebLogs:
+    Type: AWS::Logs::MetricFilter
+    DependsOn: LogGroupForWeb
+    Properties:
+      LogGroupName: !Ref BackendWebLogGroupName
+      FilterPattern: ?"[error]" ?"[crit]" ?"[alert]" ?"[emerg]"
+      MetricTransformations:
+        - DefaultValue: 0
+          MetricValue: 1
+          MetricNamespace: Backend/Logs
+          MetricName: ErrorInBackendWebLogs