Temporary Palace Enthronement Ceremony - Kadensenzasai

… There are two types of relocation ceremonies at general shrines: regular and temporary. The regular ones are called "shikinen senzasai" (yearly relocation ceremonies), and are held every 7, 13, 20, 30, 50, etc. years. In these cases, when renovations or construction are to be carried out, the divine spirit is transferred from the main shrine to a temporary shrine (gonden), and then back to the main shrine when the construction is completed. The former is called the temporary shrine relocation ceremonies (sotosengu), and the latter the main shrine relocation ceremonies (seisengu). Both involve the moving of the divine spirit, and are therefore considered to be the most important ceremonies. …

*Some of the terminology used in reference to the "Temporary Palace Enthronement Ceremony" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…　一般神社の遷座祭には，定期と臨時の二つがあり，定期の場合は〈式年遷座祭〉といい，7年，13年，20年，30年，50年等の周期をもって祭儀を執行する。この場合，改修や造営を行おうとするときに神霊を本殿から仮殿(権殿)へ，竣工時に再び本殿に移すが，前者を仮殿遷座祭(外遷宮)，後者を本殿遷座祭(正遷宮)と呼ぶ。いずれも神霊の動座を伴うので最も重要な祭儀とされる。…

※「仮殿遷座祭」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報