Kaji was a title and position used by nobility of Gorkha Kingdom (1559–1768) and Kingdom of Nepal between 1768 and 1846. Many other contemporary kingdoms used the same title for their ministers.

The Kingdom of Nepal was a Hindu kingdom in South Asia, formed in 1768 by the expansion of the Gorkha Kingdom, which lasted until 2008 when the kingdom became the Federal Democratic Republic of Nepal. It was also known as the Gorkha Empire, or sometimes Asal Hindustan. Founded by King Prithvi Narayan Shah, a Gorkha monarch who claimed to be of Khas Thakuri origin, it existed for 240 years until the abolition of the Nepalese monarchy in 2008. During this period, Nepal was formally under the rule of the Shah dynasty, which exercised varying degrees of power during the kingdom's existence.