1. how long had japanese occupied indonesia?

japanese occupation in indonesia happened in the year 1942 until 1945. so the japanese occupied indonesia for 3 years

2. what are the impacts of japanese occupation in indonesia?

the impacts are :

- many indonesian people were tortured and experienced slavery, arbitrary arrest, execution, and many more

- four million indonesian people were killed during the period

3. what was japan's promise to indonesia in 1945?

the japanese promised to indonesia that they will give an independence to indonesia at august in the same year

4. what was the cause of japan's surrender?

the japanese surrendered because the US bombed the city of hiroshima and nagasaki

5. how many indonesian people killed during japanese occupation?

there are four million indonesian were killed