In 1674, Ryoo built a Kyozo building at the Zuisho-ji Temple in Shiroganedai of Edo Shiba (present-day Minato Ward, Tokyo), there he stored a complete Daizo-kyo Sutra and also about five thousands volumes of Chinese books in the building.
なお、延宝2年（1674年）には江戸芝(東京都港区)白金台の瑞聖寺にも経蔵を建て大蔵経を完置したほか、約5,000巻の漢籍を納めた。