The grounds were also the site of the national academy, or ''Kokugaku'', established in [[1801]], and of a Confucian shrine, built in [[1837]]. Some sections of the stone walls of these structures survive today. | The grounds were also the site of the national academy, or ''Kokugaku'', established in [[1801]], and of a Confucian shrine, built in [[1837]]. Some sections of the stone walls of these structures survive today. |