On February 18, 2022, the JPO published "If it's your first time, read here - The do's and don'ts of filing a design application.
The book is divided into sections on points to be considered before filing an application, how to file an application, after filing an application, examiner's decision of refusal, etc., and is explained from the basics in a manner that is easy to understand for beginners in design applications.
Japan Patent Office
https://www.jpo.go.jp/system/basic/design/index.html