The concept of defense by building the castle and cave is done by the Japanese along the coast and hills in Aceh.
Take a look along the beaches of Lhokseumawe, Sabang and other beaches, you will easily find the remains of the remains of Japan.
So is the cave. Especially in Lhokseumawe, throughout 1942, the Japanese army forced hundreds of Acehnese to build fortresses and caves 
The hill is located 120 meters above sea level. From the direction of the hill stretching the Indian Ocean, so it is suitable to be a monitoring center of Japan at that time. 
Lhokseumawe is squeezed by two hills, Cot Panggoi and Ramulah. In Aceh, caves are known as guha or keurokrok (hiding places). The cave divides the hilly area of the region.
In addition to hiding places, the cave is often used to hold the prisoners.
"We used to work as a Japanese caterpillar maker. Forced by Japan. Romusha. No salary 
Scars of weapons are still visible on the wall. It is said that in the detention room, hundreds of lives floated because of torture.
Even in some caves there is a detention room that is just enough to stand one person. These prisoners are left standing for 24 hours in a day. In the cave, like a Japanese cave model, there is generally a reconnaissance, logistics, custody, dining room, kitchen and bedroom space. Now, the cave is a silent witness to the atrocities of Japanese soldiers in Indonesia. 