On 30 January 1984, Yangmaso was murdered by two assassins of the National Socialist Council of Nagaland (NSCN) at Nagaram, Imphal.
[1] As a far-sighted leader, Yangmaso and his policies has been considered as being highly visionary and cosmopolitan in nature.
In a recent one-day seminar on "Yangmaso Shaiza and His Manipur"[2] held on 9 March 2014 by the United All Communities Social Uplifters (UNACSU), Manipur, his legacy was summed up by Soso Shaiza as: "As Chief Minister, he was convinced that the only way to maintain peace and harmony in the state was to reach out benefits to the remotest parts of the state and to bring development to both the hills and valleys, and to all tribes and communities.
His dream was a rainbow concept of recognition and acceptance of the unique culture and character of all tribes and communities.
His vision and ideals will be realised when all tribes and communities living in Manipur make his unity-rainbow concept a reality".