Guide
Hosted at the Great Head Temple Tanjoh-ji—a sacred site of the Nichiren sect in Kamogawa, Chiba—the "Ruto-kai Sea Shakaki" is a solemn religious ceremony held annually on August 10th. This tradition involves floating lanterns upon the sea to offer prayers and memorialize the deceased. Set in this historic location, the lights illuminating the night sea offer visitors a sense of spiritual peace and a deep connection to Japanese traditional beauty.
The greatest charm is the sight of countless lanterns emerging from the darkness of the night. These floating lights are not merely a visual spectacle but a core part of a spiritual ritual filled with deep prayer. The contrast between the silent night sea and the flickering lights provides a special experience away from daily life. You can also feel the profound atmosphere of the historic Tanjoh-ji Temple. While the scenery is perfect for photography, visitors are asked to observe the ceremony quietly and respectfully to maintain the solemn atmosphere.
The event will be held on Monday, August 10, 2026. Based on previous records, the ceremony is expected to take place from evening through the night. Please note that the specific time schedule may change depending on the weather or local circumstances, so it is important to check the latest information on the official website or local announcements. The main event occurs after sunset.
The venue is the Great Head Temple Tanjoh-ji, located at the foot of Mt. Kominato in Kamogawa, Chiba. The temple is surrounded by rich nature and history. Regarding access, you will need to use public transportation or a car. Since this is a nighttime event, we recommend checking local road conditions and return transportation options in advance. The viewing area is primarily around the Oshisha-do Hall and the coastal area.
This is a religious ceremony rather than a simple tourist event. Please maintain a quiet and respectful attitude to avoid disturbing other worshippers or staff. As the event takes place near the sea at night, please be mindful of your footing and temperature changes. Approaching this as a way to touch Japanese spiritual culture will make the experience even more meaningful.
Please follow local instructions regarding any fees or donations related to this ceremony.
Most of the ceremony and explanations are conducted in Japanese; English support is limited.
Please check the official website for the latest information regarding whether advance reservations are required.
As the event takes place near the sea at night, we recommend comfortable, modest clothing and non-slip shoes. It is also wise to bring a light jacket to protect against the night chill. Please bring your own beverages.