Japan's basic salary is similar to that of ordinary workers in Singapore, but Japan has more overtime and higher overtime pay. The disadvantage of Japan is that it takes several months to participate in Japanese training after the interview is passed, and the processing cycle is about 3-6 months.
Generally speaking, there is little overtime in Singapore, and some work long hours, which is not overtime. The advantage of Singapore is that it does not need training, and it usually leaves the country in 1-4 weeks.