Gunmoo is originally from South Korea, where his family runs artisan Korean food production. Naturally, many of his childhood memories are all about food, from harvesting to cooking. In 2010, after two years of military service in South Korea, the desire for new experience drove him to Ireland. 

Gunmoo came to Ireland alone, with no language skills and money. Three months later his arrival, he luckily got a job at a small Korean restaurant in Dublin. While working in this restaurant for two years, Gunmoo found a huge market potential for Korean food in Ireland, and he started to plan Jaru, which was 2012. 

To learn and understand Irish and European food industry and business, Gunmoo went back to college, studied at DIT for a BSc Culinary Entrepreneurship for four years. While studying, he also kept working in various food environments from Asian food production to a fine-dining French restaurant to gain experience. He also travelled around the US exploring New Korean food scene in the states and worked in a Michelin-starred Korean restaurant in Manhattan. 

Gunmoo came back to Ireland in 2015, and started to develop a business plan for Jaru.  The business plan was awarded at Dockland /DIT Enterprise Competition. He developed Jaru's Kimchi as his final year project, and also published thesis regard evaluation of Korean food business in Ireland/Europe. Gunmoo and Jaru were selected for SuperValu's Food Academy in 2016, and Enterprise Ireland's New Frontiers in 2017.