Jeff obtained his Bachelor in History and Master's degree in Japanese Studies from the Philippines. He then became an Erasmus Mundus scholar at Central European University (Hungary/Austria,) and University of Florence (Italy) where he earned an MA in History and MA in Historical Science respectively. He also received an MA in Humanities from the Tokyo University of Foreign Studies. Since 2015, he taught at the university level in the Philippines, where his primary areas of interest are modern history, colonial history, and Public history, material cultures, Japanese studies, and Philippine-Japan relations. In 2023, he began teaching at a private university in Tokyo, focusing on contemporary Japanese history and Japanese culture and gender. For his tours, he loves to introduce the complex but interesting history, culture, practice and customs of Japan as he calls it as his new home.