With a lifetime interest in wildlife in general Jun started bird guiding in 1993 when he worked as a volunteer ranger at the Hikarigaoka nature park in Tokyo, Japan. After working for the Japanese Environment Agency, where he collected and managed data and at several reserves, where he was involved in setting up environmental education projects and guiding as well as general management, he left Japan. He first arrived in Australia in 1999.

Spending a year traveling around and volunteering at various bird hotspots including Broome Bird Observatory he eventually took a job as a specialist bird tour guide for inbound Japanese groups, based in the tropical Far North Queensland town of Cairns. He has been involved in several bird publications and is the author of the very popular Japanese language field guide to the birds and wildlife of the Cairns/Atherton Tablelands area.He took the majority of photographs in the New Holland A Field Guide to the Birds of Far North Queensland.

Jun leads tours around Australia and to New Guinea, around the Pacific region and Asia taking several tours to Japan each year. Jun joined Sicklebill Safaris in 2007.