Where to go in Asia in June
June is the start of the monsoon for much of Asia. Japan's rainy season begins early in the month, southern China and Vietnam are wet, and the south-west monsoon covers India, Nepal and Sri Lanka's south and west. The Andaman coast of Thailand turns wet and rough. This is a month for a narrow choice of places, not a broad one.
Those places are very good. Mongolia is green and open, with warm days and long light. Bali, Komodo and Lombok are in their dry season, before the crowds of July and August. Hokkaido escapes the Japanese rains, the Gulf of Thailand is in its better season, and Bhutan's high valleys are still accessible. Plan around dry regions and you will have a good month.