This document (information) is material I created personally. This document explains in an easy-to-understand manner the specific methods for deciphering old documents that anyone can start with "zero specialized knowledge." It also includes tips and background knowledge to further enjoy deciphering. Deciphering old documents is not simply the act of reading old characters. It is a journey that connects history and the heart, bringing the lives and thoughts of people from that time back to the present. By deeply understanding the meaning and background of old documents collected as a hobby, the enjoyment will double, and even expand tenfold or a hundredfold. Please, take this document in hand and take your first step on the journey of deciphering old documents. (Please note) ・To practice the processes in this document, a smartphone or tablet with an internet connection is required. Please note that the costs associated with the purchase, use, and maintenance of these devices are the responsibility of the reader (practitioner). ・This document is written for the purpose of enjoying it in the personal hobby field of the individual (reader). Total 20 pages.