Focus Meeting: new perspectives on light particles New physics searches in high energy frontier have confronted great challenges since the large hadron collider has not shown any clues of new particles . In the meantime, novel possibilities of light particles have drawn more attention from particle physicists and cosmologists. New light particles modify not only the low energy phenomena which can be seen in the laboratory experiments but also the cosmological/astrophysical observations which will be searched by upcoming experiments. For this reason, in the “Focus meeting: new perspectives on light particles,” we will focus on new models and related phenomena of light particles including axions and neutrinos. https://indico.ibs.re.kr/event/180/