sentences:  On 9 February, two divisions of the IJA Twenty Fifth Army, led by Lieutenant-General Tomoyuki Yamashita, landed on the northwestern coast of Singapore, in the Sarimbun area, where the Battle of Sarimbun Beach took place between predominantly Australian and Japanese troops.Yamashita's headquarters (HQ) was located at the Sultan of Johor's palace at Istana Bukit Serene, which offered him and his subordinate officers a bird's-eye view of virtually every key (both military and civilian) target in the northern part of the main island of Singapore, just only 1.6 kilometres (one mile) across the Straits of Johor.Sultan Ibrahim's palace was not ordered to be fired upon by British artillery, even when it was clear that the invading Japanese forces had their headquarters there, because any damage caused to the palace would have extensive negative repercussions for ties between Johor's royalty and their British colonial counterparts.