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真宗大谷派｜Shinshu Otani-ha文化財修理主任技術者技術専門員Engineers specializing in cultural asset restoration専門工事Specialized construction統括管理業務Management control duties契約関係Contractual relationship工事管理（設計・監理）Construction control統括管理Management control耐震調査研究委員会Seismic research study committee 日建設計（CMr）Nikken Sekkei (CMr) 日建設計（設計監理）Nikken Sekkei(Design supervision)屋根工事Roof construction木工事Carpentry耐震補強工事Seismic reinforcement左官工事Plastering内装畳工事Tatami flooring統括管理業務Management control技術指導Technical guidance仮設素屋根工事Scaffolding and temporary roof construction設備工事Building servicesPhotography｜1：提供 大林組／Courtesy Obayashi Corporation｜2：便利堂／Benrido3–4：日建設計／Nikken Sekkei｜5：柄松 稔／Minoru Karamatsu伝統技術と最新技術の融合本事業は200年先に必要とされる解体修理に向けて、木造建築物を健全に維持していくための中間的な修復事業です。文化財学識経験者や木造耐震の専門家の指導のもと、伝統技法を遵守・継承し、文化財価値保存を最優先としながらも、さまざまな工夫を凝らして最新技術を積極的に導入しました。木造変形性能を活かした耐震補強、防災性能の向上、仮設素屋根のスライド・転用、環境配慮などがこれにあたります。　また、日建グループはコンストラクション・マネジャー（CMr）の役割も果たしました。仮設素屋根内の維持や安全管理を行う統括管理業務をゼネコンに発注した上で、3棟合計48の専門工事を分離発注し、文化財修復としては初となるコストオン方式を応用した分離発注方式を採用。すべての専門工事の発注権を宗派側が有しながらも、仮設や安全管理面で経験の豊富なゼネコンが技術力を発揮して工期を短縮し、透明性と合理性の確保を実現しました。Fusion of Traditional and Cutting-Edge TechniquesIntermediary restoration was undertaken to maintain the wooden building in a healthy condition until the disman-tling and repair scheduled in 200 years. While utilizing the latest technologies, the project accorded high priority to applying and carrying on traditional techniques, preserving the building’s value as a cultural asset. Special care went into this project: Seismic reinforcement leveraging the inherent deformation properties of wooden structures; improvement of disaster prevention performance; sliding and reusing the scaffolding and temporary roof structure; and consideration for the environment. A general contractor took charge of general management including maintenance and safety, and 48 specialists were contracted separately for the three buildings. The “cost-on” subcontracting method was adopted for the first time in a cultural asset restoration. The experienced general contrac-tor mobilized technical experience to shorten the construc-tion period and augmented transparency and efficiency. 体制・発注区分｜Organization and Contracting Scheme本事業では、3棟全工事を48の専門工事に分け、その特殊性に応じ、きめ細かく発注方法を選定。すべての発注手順、選定経過を発注者である宗派と共有し、宗派の議会による承認のもと行うことで、寄進事業運営面での透明性を確保した。e construction work for the three buildings was divided into 48 specialized projects, and contracting methods were carefully selected aer considering the special characteristics of the work. By sharing all of the contracting procedures and selection processes with the client, and moving forward only with the approval of the religious organization council, we ensured transparency for the donation arm of the organization.5292019 AUTUMN40Feature | WORKS