Tōshōji Bell Tower: A Gem of Edo-Period Zen Architecture in Rural Okayama
Nestled in the tranquil Yokotani valley of Yakage Town, Okayama Prefecture, the bell tower (shōrō) of Tōshōji Temple stands as a beautifully crafted example of Edo-period Zen temple architecture. Registered as a National Tangible Cultural Property in 2011, this two-story wooden structure connects the temple's main hall (hondō) to its meditation hall (zendō), serving both a practical and spiritual role within one of the most historically significant Sōtō Zen monasteries in the Bitchū region.
Historical Background of Tōshōji Temple
Tōshōji Temple traces its origins to the Asuka period, when it is said to have been established during the reign of Emperor Tenji. Originally a Hossō-sect temple called Tōshōji-in, it once boasted seven main buildings and 36 sub-temples. However, the temple fell into decline during the medieval period.
In 1412 (Ōei 19), the eminent Zen monk Kizan Shōsan, a disciple of the great Sōtō master Jochū Tengin from Daiin-ji in Tōtōmi Province (modern-day Shizuoka), revived the temple at the request of the Shō clan, lords of nearby Sarukake Castle. Under Kizan Shōsan's leadership, Tōshōji was transformed into a thriving Sōtō Zen monastery. At its peak, the temple served as a regional head temple (chūhonzan) overseeing approximately 1,200 branch temples across Bitchū Province and beyond.
The temple also received the patronage of the powerful Mōri clan, particularly Mōri Motokiyo, the fourth son of the legendary warlord Mōri Motonari, who became lord of Sarukake Castle in the late 16th century. A memorial pagoda (hōkyōintō) for Motokiyo still stands on the temple grounds today.
Why the Bell Tower Is Designated as a Cultural Property
The Tōshōji Bell Tower was registered as a National Tangible Cultural Property (Registered Tangible Cultural Property — Building) on July 25, 2011, along with several other structures on the temple grounds. The bell tower is valued for its refined architectural design and its role in the overall composition of the temple complex.
Situated between the main hall and the meditation hall, the bell tower serves as a connecting element in the monastery's layout. The structure measures 5.3 meters along the ridge (keta-yuki) and 4.0 meters in depth (hari-ma). It features a distinctive two-story design: the lower level has a ryōsage-zukuri (shed-roof) form with san-gawara tile roofing, while the upper level is a square-plan structure with an irimoya-zukuri (hip-and-gable) roof covered in hon-gawara tiles, with the ridges set perpendicular to each other.
The upper story is particularly notable for its elaborate decorative elements. The walls feature katōmado (cusped or flame-shaped windows), and the structure is surrounded by engawa balconies with takaran (decorative railings). The horizontal tie beams (kashiranuki) are carved with uzumon (spiral patterns), and the gable walls display hishigōshi (diamond-lattice) designs. These ornamental details give the bell tower a strikingly elegant appearance that is unusual for a structure of its type.
Architectural Highlights and Points of Interest
The bell tower's most captivating feature is the contrast between its functional lower story and the ornate upper story. The lower level serves as a covered passageway linking the main hall to the meditation hall, a practical arrangement typical of well-planned Zen temple complexes. The upper story, where the temple bell is housed, rises above with its graceful hip-and-gable roof, perpendicular to the lower roof — creating an eye-catching visual interplay of forms.
Visitors should take time to appreciate the katōmado (flame-shaped windows) on the upper story walls, a design motif borrowed from Chinese Zen architecture that became a hallmark of Japanese Zen temples. The uzumon spiral carvings on the tie beams and the hishigōshi diamond-lattice gable panels demonstrate the high level of craftsmanship that went into even this relatively small building.
The bell tower should be viewed as part of the larger Tōshōji temple complex, where nearly every building — the main hall, the abbot's quarters (hōjō), the kitchen-residence (kuri), the meditation hall, the founder's hall, and more — is also registered as a National Tangible Cultural Property. Together, they form one of the most complete surviving examples of a Sōtō Zen monastery from the Edo period.
Experiencing Tōshōji Temple Today
Tōshōji remains an active Zen monastery and is officially recognized as a Sōtō Zen training center. The temple actively welcomes both Japanese and international practitioners for Zen meditation retreats and zazen (seated meditation) experiences. When visiting, you may see monks from various countries engaged in their daily practice — cleaning the grounds, sitting in meditation, or participating in ceremonies.
The approach to the temple leads through a quiet mountain valley, past a sōmon (outer gate) and up to the impressive sanmon (main gate), which is designated as a Yakage Town Cultural Property and dates to 1843. The serene natural surroundings — dense forests, the sound of running water, and birdsong — create an atmosphere perfectly suited to contemplation and reflection.
Visitors are welcome to view the temple grounds, though as this is an active training monastery, respectful behavior and quiet observation are expected. Zazen experience sessions are available for those who wish to try Zen meditation firsthand.
Surrounding Attractions
Yakage Town offers a wealth of historical and cultural attractions beyond Tōshōji. The town prospered as a post station on the old San'yōdō highway during the Edo period, and its beautifully preserved streetscape was designated as a National Important Preservation District for Groups of Traditional Buildings (Jūdenken) in 2020.
The Former Yakage Honjin Ishii Family Residence and the Former Yakage Waki-Honjin Takakusa Family Residence are both designated as Important Cultural Properties — a nationally unique distinction, as no other town in Japan retains both its main and sub-lodgings for traveling feudal lords. Daitsūji Temple, with its exquisite pond garden designated as a Place of Scenic Beauty, is another must-visit destination in the area.
Sarukake Castle ruins, closely linked to Tōshōji's history, can be reached by a hiking trail from the base of the mountain. The castle site offers panoramic views of the surrounding countryside and tangible remnants of its Sengoku-period fortifications. Yakage is also known as Japan's first officially recognized "Albergo Diffuso Town," offering charming accommodations in renovated traditional buildings scattered throughout the historic district.
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Q＆A
- What type of cultural property is the Tōshōji Bell Tower?
- It is a National Registered Tangible Cultural Property (Building), registered on July 25, 2011. This designation recognizes buildings of historical and architectural significance that contribute to the cultural landscape of Japan.
- Can visitors participate in zazen (Zen meditation) at Tōshōji?
- Yes, Tōshōji is an active Sōtō Zen training center that welcomes visitors for zazen experiences. The temple also accepts international practitioners for longer meditation retreats. It is advisable to contact the temple in advance to confirm schedules and availability.
- How do I get to Tōshōji Temple?
- The nearest train station is Mitani Station on the Ibara Railway. From the station, the temple is approximately a 5-minute drive. If traveling by car, the temple is accessible from the San'yō Expressway via the Yakage Interchange. Parking is available at the temple.
- How many buildings at Tōshōji are registered cultural properties?
- Nearly all the major buildings at Tōshōji are registered as National Tangible Cultural Properties, including the main hall, the abbot's quarters and study, the kitchen-residence, the meditation hall and guest quarters, the founder's hall and memorial hall, the study hall Gessenin, the bell tower, the second gate, the gate and earthen walls, and the stone walls and stone bridge. The main gate (sanmon) is separately designated as a Yakage Town Cultural Property.
- What is the historical significance of Tōshōji Temple?
- Tōshōji was revived as a Sōtō Zen monastery in 1412 and became one of the most influential temples in the Bitchū region, overseeing approximately 1,200 branch temples at its peak. It was closely associated with the Shō clan of Sarukake Castle and later with the Mōri clan, both of whom played key roles in the region's turbulent Sengoku-period history.
Basic Information
| Name | Tōshōji Bell Tower (洞松寺鐘楼) |
|---|---|
| Cultural Property Designation | National Registered Tangible Cultural Property (Building) |
| Registration Date | July 25, 2011 |
| Period | Edo period |
| Structure | Two-story wooden structure, tile roof, building area approx. 18㎡ |
| Temple Name | Funakiyama Tōshōji (舟木山 洞松寺) |
| Sect | Sōtō Zen (曹洞宗) |
| Principal Image | Hōkan Shaka Nyorai (Crowned Shakyamuni) |
| Founded | Asuka period (c. 670); revived 1412 by Kizan Shōsan |
| Owner | Religious Corporation Tōshōji (宗教法人洞松寺) |
| Address | 3796 Yokotani, Funakidani, Yakage-chō, Oda-gun, Okayama Prefecture |
| Access | Approx. 5 minutes by car from Mitani Station (Ibara Railway) |
References
- 洞松寺鐘楼 - 文化遺産オンライン
- https://bunka.nii.ac.jp/heritages/detail/239499
- 洞松寺本堂 - 文化遺産オンライン
- https://bunka.nii.ac.jp/heritages/detail/161374
- 洞松寺禅堂及び接賓 - 文化遺産オンライン
- https://bunka.nii.ac.jp/heritages/detail/224716
- 国指定文化財等データベース - 洞松寺鐘楼
- https://kunishitei.bunka.go.jp/bsys/maindetails/101/00008768
- 高梁川流域連盟 - 洞松寺
- https://takahashiryuiki.com/feature/高梁川流域の指定文化財（建造物）/矢掛町/洞松寺/
- 洞松寺 (岡山県矢掛町) - Wikipedia
- https://ja.wikipedia.org/wiki/洞松寺_(岡山県矢掛町)
- 矢掛の文化財 - 洞松寺境内
- https://bunkazai.yakage-kyouiku.info/shiteibunkazai/ticp/ticp_7
Last verified: 2026.04.09