diff --git a/pom.xml b/pom.xml
index 45fe8c1..280e5cb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -82,17 +82,31 @@
       <version>1.14</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.jacoco</groupId>
+      <artifactId>org.jacoco.agent</artifactId>
+      <version>0.8.1</version>
+      <scope>test</scope>
+      <classifier>runtime</classifier>
+    </dependency>
   </dependencies>
 
   <build>
     <defaultGoal>install</defaultGoal>
     
     <plugins>
+      <!-- mvn site -->
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-site-plugin</artifactId>
         <version>3.7.1</version>
+        <configuration>
+          <locales>ja</locales>
+          <inputEncoding>${project.build.sourceEncoding}</inputEncoding>
+          <outputEncoding>${site.encoding}</outputEncoding>
+        </configuration>
       </plugin>
+
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-project-info-reports-plugin</artifactId>
@@ -116,6 +130,38 @@
         </configuration>
       </plugin>
       
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-surefire-plugin</artifactId>
+        <version>3.0.0-M3</version>
+        <configuration>
+          <systemPropertyVariables>
+            <jacoco-agent.destfile>target/jacoco.exec</jacoco-agent.destfile>
+          </systemPropertyVariables>
+          <!-- ↓これがないとスタックトレースが出ない -->
+          <trimStackTrace>false</trimStackTrace>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.jacoco</groupId>
+        <artifactId>jacoco-maven-plugin</artifactId>
+        <version>0.8.5</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>prepare-agent</goal>
+            </goals>
+          </execution>
+          <execution>
+            <id>default-report</id>
+            <phase>test</phase>
+            <goals>
+              <goal>report</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+            
       <!-- mvn release:prepare -->
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
@@ -126,7 +172,6 @@
           <tagNameFormat>v@{project.version}</tagNameFormat>
         </configuration>
       </plugin>
-
     </plugins>
   </build>
   
@@ -137,6 +182,8 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-report-plugin</artifactId>
       </plugin>
+      
+      <!--  Javadoc report to site -->
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-javadoc-plugin</artifactId>
@@ -148,35 +195,21 @@
           <charset>UTF-8</charset>
         </configuration>
       </plugin>
-      <plugin>
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>cobertura-maven-plugin</artifactId>
-        <configuration>
-          <failOnViolation>true</failOnViolation>
-        </configuration>
-      </plugin>
 
-      <!--  UnitTest report to site -->
+      <!--  Coverage report to site -->
       <plugin>
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>cobertura-maven-plugin</artifactId>
-        <version>2.7</version>
+        <groupId>org.jacoco</groupId>
+        <artifactId>jacoco-maven-plugin</artifactId>
+        <version>0.8.5</version>
         <reportSets>
           <reportSet>
             <reports>
-              <report>cobertura</report>
+              <report>report</report>
             </reports>
           </reportSet>
         </reportSets>
-        <configuration>
-          <inputEncoding>UTF-8</inputEncoding>
-          <outputEncoding>UTF-8</outputEncoding>
-          <formats>
-            <format>xml</format>
-            <format>html</format>
-          </formats>
-        </configuration>
       </plugin>
     </plugins>
+    
   </reporting>
 </project>
\ No newline at end of file