Every year, I remember renewing CotoGoto's SSL in January, but for some reason the SSL I'm using is committing fraud, and I was involved in a trouble that Google could not use it, and each time I replaced it with a new one It is caught in a loop that is forced.

That's why there are alternative certificates, so I looked for FujiSSL.
Make a note of the procedure.

StartSSL⇒RapidSSL⇒FujiSSL ← here

1. First create a keystore.

Keytool -genkey -alias tomcat -keyalg RSA -keystore yourdomain.jks -keysize 2048

Execute the above command and enter your information.

* Information entered when creating the keystore is reflected in the CSR.
* When changing the key store name, path, and key store password from the default values, settings in a separate configuration file (server.xml for Tomcat) are required.

Here reference I made it.

2. Generate a CSR.

Keytool -certreq -alias tomcat -file request.csr -keystore yourdomain.jks

After this, import the intermediate CA / public certificate into the keystore.

3.FujiSSL certificate acquisition

this FujiSSL I will get it from.

4. Import the intermediate CA.

keytool -import -trustcacerts -alias intermediate -file ca-bundle.ca -keystore yourdomain.jks

5. Import the public certificate.

Keytool -import -trustcacerts -alias tomcat -file yourdomain.crt -keystore yourdomain.jks

6. Check the imported contents.

keytool -list -v -keystore yourdomain.jks -storepass password