Olive Young Busan Station is in the 2F waiting hall of Busan Station (206 Jungang-daero) and opens at 8:30 AM, handy before an early KTX. Daiso Busan Station (191 Jungang-daero) is just in front of the station, 10 AM–10 PM. Daiso also has a chamomile scent (18K+ orders). Busan store stock wasn't checked.
Daiso Mall
Daiso MallDaiso Mall