During the Taisho era, Iwashimizu Hachimangu Shrine, which had been renamed from "Otokoyama Hachimangu" during the Meiji era (1918), saw a reaffirmation of traditional faith. In 1915, the Tonguden, which had been destroyed in the Battle of Toba-Fushimi, was rebuilt, and the memorial service for aviation victims began. Details regarding Iwashimizu Hachimangu Shrine during the Taisho era: Restoration of the Shrine's Name: After being called "Otokoyama Hachimangu" due to the Meiji Restoration, the shrine was officially renamed "Iwashimizu Hachimangu" in 1918 (Taisho 7) to preserve the historically significant name "Iwashimizu." Construction of the Tonguden: The shrine building (Tongu) that was destroyed in the 1868 Battle of Toba-Fushimi was rebuilt in 1915 (Taisho 4). This building is an important location used when the gods move from the main hall on the mountain during the Iwashimizu Festival. The Birth of Aviation Faith: In 1915, a shrine (separate from the later Hikō Jinja) was established near the shrine by Chuhachi Ninomiya to commemorate the victims of airplane accidents, marking the beginning of the faith for aviation safety and victory. National Treasure - Main Hall: The main hall, built by Tokugawa Iemitsu in the Edo period (1634), remained the oldest and largest Hachiman-zukuri structure, continuing to attract the faith of worshippers during the Taisho era.