The answer is - Malaysia, Indonesia, Japan, Brunei Darussalam, Taiwan, and the Philippines.
- Malaysia is the only of this countries that is not totally on island/s, but it is partially on an island and partially on the southern part of the Southeast Asian mainland.
- Indonesia is a country that is laying on multiple islands, some of which are some of the biggest in the world, it is also the biggest of these countries and one of the biggest countries in the world.
- Japan is mainly formed of four big islands that are in close proximity to each other, and is a created by volcanic activity.
- Brunei Darussalam is a small little known country from the far east. It occupies just a part of an island. It is a country known for it's oil and gas reserves.
- Taiwan is located on a medium sized island south of China. It is a territory of dispute and China still claims rights on it even though it is a separate country.
- The Philippines are consisted of multiple islands and are one of the most recently ''discovered'' by the people from the ''Old World''. It is a very densely populated island with one of the largest populations in the world.