where is the most suitable for you?

First, comparing between Japan and Malaysia, Japan has a developed economy, varied culture, and religion. This is a country ranked in the world-leading about the economy, as well as the quality of life, besides, Malaysia is a country in Southeast Asia, although it is not as highly appreciated as Japan, Malaysia has the 29th largest economy in the world and a developed industrial country.
Second, there has much chance to work in Japan for foreigners with diverse fields, in the meanwhile, Malaysia has a policy of prioritizing jobs for indigenous people to decrease the country's unemployment rate.
Third, The language requested in Japan is Japanese while English is a common language in the working environment in Malaysia.
Fourth, time and frequency of working in Japan are tighter than in Malaysia.
Just, in conclusion, there is more chance of a job and higher life quality in Japan than Malaysia, nevertheless, accompanied by is the higher requests of languages and experience for the employee to get a job in Japan.
Depends on your ability to decide where is the most suitable for you.