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Hiep LeeHiep Lee 

Modifying the "New Email on Case" Template in Salesforce to Japanese

 If you are using Email-to-Case on Salesforce, there is a super handy standard feature that will send an e-mail out to the case owner when a new incoming e-mail is filed against one of their cases.
   This is an option turned on via Setup > Customize > Cases > Email-to-Case and then checking the box "Notify Case Owners on New Emails".
<An email has been received for case 00001089: Test.
Please click the link below to review the new email and respond appropriately.
NOTE: It is not recommended that you forward this email because its association with the original case may be lost.
 But my customers who are Japenese wants to change it to Japanese. It's any possible way to create an auto-mail like that in Japanese.

Thanks and best regard.
Le Tien Hiep
SandhyaSandhya (Salesforce Developers) 

Refer below salesforce help article for the solution.

Please mark it as solved if my reply was helpful. It will make it available for other as the proper solution.
Best Regards
Hiep LeeHiep Lee
Thank a lot for your help but my problem is to modify a stand notification "New Email on Case" Salesforce but not the display problem.