Iyo Province Ichinomiya
Oyamazumi Jinja
大山祇神社
Oyamazumi Jinja is the ichinomiya — the leading shrine — of the former Iyo Province, in present-day Ehime. It has a car park (about 13 spaces); the sources we checked do not give a fee. Opening hours end at 16:00 (shrine office). Without a car, the shrine's own website gives 2 routes from a station (by bus); the station names are listed below. We found 24 entries for the shrine in Japan’s national database of designated cultural properties, 1 of them National Treasure. The nearest other ichinomiya is Susanoo Jinja, 42 km to the north-east in a straight line.
Getting there
愛媛県今治市大三島町宮浦 3327
The address is given in Japanese on purpose. Show it to a taxi driver, or copy it into a car navigation system — an English transliteration will not be recognised.
For a car navigation system
- Phone
- Japanese car navigation searches by phone number. This is the fastest way to enter a destination.
- Coordinates
- From OpenStreetMap, as 大山祇神社. Not checked on the ground
- Address
How to rent and drive a car in Japan →
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By train and bus
- From 福山駅
- By bus.
- From 今治駅
- By bus, about 65 min.
The source, word for word (bus stop names included):
・JR福山駅→しまなみライナー→大三島BS（バスストップ）下車 →瀬戸内海交通（宮浦港行）約１２分→大山祇神社前下車 ・JR今治駅前→せとうちバス（特急）または瀬戸内海交通（急行）約６５分 →大山祇神社前下車
Taken from the shrine's own website (アクセス | 【公式】大山祇神社, checked 2026-10-08). Station and stop names stay in Japanese so you can match them to signs. Fares and timetables are not given — they change.
Parking
It has a car park (about 13 spaces); the sources we checked do not give a fee.
鳥居脇13台のみ。近隣の大三島藤公園（市営駐車場）が無料50台。料金は確認できず
The note above is in Japanese; it usually records dates when the car park is closed, and the fee.
Shrine office hours
Opening hours end at 16:00 (shrine office).
The full note from the source, in Japanese:
9:00-16:00（電話受付も同じ）。閉門17:00。宝物館 9:00-16:30（最終入館16:00）※愛媛県観光公式は 9:00-16:00・入館15:30まで と記載しており食い違いがある
Closing times of every ichinomiya, earliest first →
Combining it with the 2 other ichinomiya within 80 km? Work out an order that reaches each office before it closes →
History in brief
- Founding
- According to tradition, Ochi-no-Mikoto, a descendant of Oyamatsumi, enshrined the deity on Omishima before Emperor Jimmu's eastern campaign.
- Moved
- The shrine moved to its present site on the 22nd day of the 4th month of 719, the date kept for its annual festival.
- Moved
- Before that, it is said to have stood at Seto in the southeast of Omishima.
- Buildings
- The main sanctuary was rebuilt in the early Muromachi period.
Summarised from the shrine's own website (大山祇神社について, checked 2026-10-08). Traditions are given as the shrine tells them, not as established history.
Enshrined deities
- Oyamazumi-no-Kami 大山積神 5 ichinomiya enshrine this deity →
The shrine's website gives its deity as Ōyamazumi-no-Ōkami alone. Subsidiary shrines enshrine Ōikazuchi-no-Kami and Takaokami-no-Kami, each with a goddess.
Our English summary of the Japanese description. Spelling as given by the shrine's own website.
Nationally designated cultural properties
- 大山祇神社宝篋印塔
-
Important Cultural Property
石造宝篋印塔
designated 1952-11-22 · late Kamakura period - 大山祇神社拝殿
-
Important Cultural Property
桁行七間、梁間四間、一重、切妻造、檜皮葺
designated 1953-03-31 · early Edo period - 大山祇神社本殿(宝殿)
-
Important Cultural Property
三間社流造、檜皮葺
designated 1904-08-29 · mid-Muromachi period - 赤絲威鎧〈大袖付／〉
- National Treasure
- 浅葱糸威褄取鎧〈大袖付／〉
- Important Cultural Property
- 色々威胴丸〈兜、大袖一隻付／〉
- Important Cultural Property
- 色々威胴丸〈兜、頬当、大袖、籠手付／〉
- Important Cultural Property
- 色々威腹巻〈兜、喉輪、大袖付／〉
- Important Cultural Property
- 色々威裾萌黄素懸腹巻
- Important Cultural Property
- 色々威鉄腹巻〈籠手付／〉
- Important Cultural Property
- 藍韋威肩腰白胴丸〈大袖付／〉
- Important Cultural Property
- 藍韋威肩腰白胴丸〈大袖付／〉
- Important Cultural Property
- 藍韋威胴丸〈兜、大袖付／〉
- Important Cultural Property
- 藍韋威胴丸〈兜、大袖付／〉
- Important Cultural Property
- 藍韋威胴丸〈大袖付／〉
- Important Cultural Property
- 藍韋威胸白紅白腹巻〈大袖付／〉
- Important Cultural Property
- 藍韋威胸白紅白腹巻〈大袖付／〉
- Important Cultural Property
- 藍韋威胸紅白紅腹巻
- Important Cultural Property
- 藍韋威胸紅白紅腹巻
- Important Cultural Property
- 藍韋威胸紅白腹巻
- Important Cultural Property
- 藍韋威腹巻〈兜、大袖付／〉
- Important Cultural Property
- 藍韋威裾紫胴丸〈兜付／〉
- Important Cultural Property
- 藍韋威鎧
- Important Cultural Property
- 大山祇神社のクスノキ群
- Natural Monument
Source: the national register. All of them together →
Festivals
- Principal annual festival
-
旧暦4月22日 例大祭
This is an old-calendar date; the Gregorian day differs every year.
source
Other festivals and rituals
- 産須奈大祭（秋祭り）
- 旧暦8月21日・22日
old-calendar date - 御田植祭
- 旧暦5月5日
old-calendar date - 抜穂祭
- 旧暦9月9日
old-calendar date - 御更衣御戸開祭
- 旧暦4月21日／11月22日
old-calendar date - 生土祭・福木神事
- 1月7日
Nearest ichinomiya
The closest is Susanoo Jinja, about 42 km to the north-east in a straight line, the ichinomiya of Bingo Province. After that come Kibitsu Jinja (Bingo) (43 km north-east) and Itsukushima Jinja (63 km west).
Straight-line distances between the shrines, not road distances. Across mountains or water, the drive is much longer.
Why this shrine is called an ichinomiya
Listed by the pilgrimage association
It appears on the map published by the Ichinomiya Pilgrimage Association. We have not yet checked other primary sources.
- 全国一の宮巡拝会『全国一の宮神社所在地』（平成30年5月・改訂版 第4版） (checked 2026-09-09)
More on how the shrines of this province relate to one another is on the Iyo Province page.
Historical rank
- Province
- Iyo Province (Nankaidō)
- Prefecture
- Ehime
- Engishiki (927)
- Myōjin Taisha
- Former state rank (1871–1946)
- Kokuhei Taisha
Sources
- https://oomishimagu.jp/access/ (checked 2026-09-09)
- https://www.city.imabari.ehime.jp/kanko/spot/?a=226 (checked 2026-09-09)
- https://oomishimagu.jp/about/ (checked 2026-09-10)
- https://www.oomishimagu.jp/ (checked 2026-09-10)
How we handle spellings, festival selection, former ranks and map accuracy is set out once on the About page.