Lamjung and Kaski was a state which was given to His Highness Shree Tin Maharaja Jung Bahadur Rana in 1856 by His Majesty King Surendra Bir Bikram Shah.

The present Lamjung and Kaski State is spread over the present-day Gandaki Province excluding the Mustang and Gorkha regions and has an area of 21,504 km2.

In 1856, a sanad was given to Jung Bahadur Rana that gave him a right to use the title of Maharaja (Great King) and he was given Lamjang and Kaski State.

[4] After Chandra Shumsher's reign the British gave all the Maharajahs of Lamjang and Kaski the title, His Highness.

He banned ritual suicide, and made additional reforms such as abolishing slavery with money from the treasury of Pashupatinath temple.

He was the second Maharajah of Lamjang and Kaski and the second Prime Minister of Nepal to visit Britain and tour Europe after Jung Bahadur.

On 24 June, the University of Oxford conferred the honoris causa degree of Doctor of Civil Laws on him.

On his departure, the Daily Telegraph wrote: During the last few years this country has been visited by an unexampled succession of foreign personages, but none of them has been more interesting and few more important than the Prime Minister of Nepal.

He provided monetary and military assistance to Britain in the First World War,[9] as a result of which Nepal received a huge sum of monetary assistance, and the friendship became even more cordial after the successful conclusion of the Nepal–Britain Treaty of 1923, which recognised Nepal as an independent nation and an ally of the British Empire.

Juddha Shumsher introduced the system of pension payment to civil servants and opened an office for keeping records of people's births and deaths.

He was the Minister of Foreign Affairs, Finance, Water Resources, Panchayat, Transport & Tourism, and Education after the Rana Regime ended.