伊豆毛神社
Shimoizumo, Toyono Town, Nagano City
A Shrine Revered by the Sanada Clan
During the Bunroku era, Tennokawa Hyoejo enshrined Oyama Tsumi no Kami. In Keicho 14, the shrine was merged with the spirit of Take Minakata Tomi no Mikoto from a nearby village shrine. This land was under Matsushiro domain during Genna 8, when offerings like curtains and bows were made. The shrine was deeply revered by the Sanada clan of Matsushiro domain. In Kaei 1, Sakuma Shozan conducted a festival, and in Meiji 18, it was renamed Tennokawa Shrine from its former name, Suwa Shrine.
In the past, the shrine was located at Kami-Izumoge Yakumo-dai. It received various elevations of rank from Emperor Seiwa, reaching Lower Fourth Rank in Genji 1 under Emperor Komei. In Tenmei 6, the shrine was renamed from Izumo Daimyojin to Izumo Shrine. The original location at Yakumo-dai is designated as a historic site.
The shrine, built facing west as if turning its back to the morning sun, is located on a slightly elevated area overlooking Toyono town. The well-maintained torii and handrails suggest that festivals and events at this shrine are integral to the local residents' lives.
The main hall, which cannot be seen from the outside as it is housed within a covering structure, is in the nagare-zukuri style, common in Nagano Prefecture. The hall of worship was also built in the Edo period. The shrine is located about a 10-minute walk from JR Toyono Station.
| Location | Toyono, Toyono Town, Nagano City |
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| Website | None |
| Deities | Susa-no-O no Mikoto, Okuninushi no Mikoto |
| Main Hall | Kaei 1 (1848) |
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| Architectural Style | Nagare-zukuri, cypress bark roofing |
| Hall of Worship | Kaei 1 (1848) |
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| Architectural Style | Five bays by three bays, gabled entrance |