History Kumai was once part of the Kotaringin Monarchy. It was originally lead by Pangeran Bendahara, who later gave Kumai to Muhammad Cik, Kumai's village leader. Cik then gave his position to Amsar, who was chosen to be regent of Kumai. Kumai was a base for Indonesian fighters attacking the Dutch and Japanese on January 14, 1946. Many soldiers died at the base, but it was maintained. To commemorate the battle, the government built a monument and the Taman Bahagia Park in Sei. On Tendang, and on every January 14, people celebrate in the park to remember Kumai's soldiers. The Kobar regent always attends. Later, the regent H. Abdul Razak signed a region regulation regarding district forming in a plenary council meeting. Seven factions of council supporters agreed and accepted the Raperda that divided the Kumai District into the specified regions: Pangkalan Lada, Pangkalan Banteng, and Kumai as the main district. Razak later explained, "By forming two new ...