Lee Su-jin, who started his professional career as a janitor at a love hotel in South Korea during his early twenties, has become one of the wealthiest people in the country with a net worth of $1.2bn. Lee holds a 32% stake in Yanolja, a South Korean travel app that provides hotel and travel bookings, with his wife and two daughters, and is valued at $6.7bn following a $1.7bn minority investment by Japan’s SoftBank Vision Fund 2 in 2021. Yanolja reported revenue of KRW444.3bn ($345m) in the first nine months of 2022, up 87% YoY, while net profits rose 22% to KRW23.5bn in the same period. The company has also experienced success with its cloud-based software, which automates the traditional reservation process, with sales doubling over the past year.