On 5 historic reconstructions designed by Minoru Ooka, especially external appearance, such as delicate curved roof shape, was faithfully recreated based on academic investigation. The structure was basically reinforced concrete, but he attempted to keep the original proportion of wooden structural members by means of, for instance, manipulation of sectional modification of posts and beams. Among his works, Yakushiji Golden Hall (1976) is one of the most characteristic specimen that reveals his idea toward historic reconstructions. He tried to revive original architect's design concept as representation of the aesthetics of the same period, which was shown in the number of columns (6×3) on the upper floor, the gradually raised ceiling heights toward the inner sanctum, and the roof shape; high pitched gable and low pitched hip roof(shikoro-buki) that has, he thought, aesthetical importance on the ancient architecture.
