Dhaka, June 7 -- Indian billionaire Gautam Adani has once again emerged as Asia's wealthiest individual, after shares in his sprawling conglomerate posted steep gains on Friday, adding billions to his personal fortune in a single session.

According to Forbes, Adani's net worth swelled by nearly $2.5 billion in one day, bringing his total wealth to $89.2 billion. The jump placed him ahead of fellow Indian tycoon Mukesh Ambani, whose fortune currently stands at $88 billion, and Japanese technology investor Masayoshi Son, the head of SoftBank Group, whose wealth fell to $87 billion following a sharp downturn in Japanese equity markets.

The development carries particular relevance for Bangladesh, where Adani Power - the conglomerate's power...