'the department of the great treasury') was a division of the eighth-century Japanese government of the Imperial Court in Kyoto,[1] instituted in the Asuka period and formalized during the Heian period.

The nature of the ministry was modified in response to changing times.

[3] Since 1885, Ōkura-shō has been construed in reference to the Ministry of Finance, also called the Ōkura no Tsukasa.

[4] The court included a ministry dealing with military affairs.

[3] Amongst the significant daijō-kan officials serving in this ministry structure were: