Tan Passakornnatee (Ichitan Group)

Tan Passakornnatee, the beverage tycoon behind Oishi and Ichitan, grew Ichitan Group's 2025 net profit to 2.1 billion baht, a 34% jump year-over-year. His ready-to-drink tea line achieved a 28% market share, outperforming #3 Sarath Ratanavadi's beverage ventures by 12 percentage points in Thailand's convenience store channel. Ichitan's production cost per unit is 8% lower than the average for Thai tea brands, thanks to proprietary cold-brew technology that cut energy use 22%.