Holy site

Itsukushima-jinja

Itsukushima, Aki, West San'yōdō, Kingdom of Yamato

Itsukushima-jinja is a holy site in Crusader Kings III, in Itsukushima, Aki, West San'yōdō, Kingdom of Yamato. The county's holder gets Knight Effectiveness +5%. While their faith holds it, followers get Knight Effectiveness +10%. 2 faiths count it holy, among them Shintōism and Utaki. Patch 1.20.0.3, from game/common/religion/holy_site_types/00_holy_site_types.txt.

The county's holder gets

Knight Effectiveness+5%

Followers get, while their faith holds it

Knight Effectiveness+10%

Per level of enshrined relics

These grow with the total rarity of the relics enshrined at the site (holy_site_total_artifact_rarity): the value below is per level.

Followers

Knight Effectiveness+2%
Coastal Advantage+1

The county

Development Growth in Plains+1%
Levy Size+2%

Source: game/common/religion/holy_site_types/00_holy_site_types.txt (key itsukushima), each faith's holy_site list, common/landed_titles and map_data, Crusader Kings III 1.20.0.3.