In Jainism, Avsarpini is the descending half of the time cycle (Kālchakra), during which the conditions of the world gradually deteriorate. Each Avsarpini is divided into six unequal periods called aras (eras).

The first ara (also called "Sukhama Sukhama") is the period of maximum happiness, prosperity, and virtue. During this era, there is no sorrow, disease, or suffering, and people are extremely tall, live for unimaginable lengths of time, and have all their needs fulfilled without any effort.

Vasan in this context refers to the "state" or "condition" during a particular period. So, in the first vasan (avastha) of Avsarpini, the world is at its most ideal and blissful state.

Key features of the 1st ara (Sukhama Sukhama) in Avsarpini:

• Duration: Vast, lasting for countless years (e.g., 400 trillion sāgaropamas, according to Jain texts).
• Humans are extremely tall (miles high) and live for incredibly long periods (lakhs of years).
• There is no need for food; people are nourished by "manna" (celestial food).
• There is no crime, disease, or unhappiness.
• There is no need for language, weapons, or agriculture—everything is provided naturally.
• Righteousness (dharma) and happiness prevail completely.

Summary: In Jain cosmology, the first vasan (era) of Avsarpini is a time of perfect happiness and ease, unmatched by any later period, and represents the peak of worldly well-being before gradual decline begins in subsequent aras.