Rubuta ci gaba ga wannan sakin layi - Bayan 'yancin Koriya
a 1945, ya shiga cikin kafa Kungiyar Kimiyyar Kimiyyar Kimiyyar Koriya a watan Satumba. A watan Oktoba na wannan shekarar, tare da shawarar Myung Joo-wan, ya zama farfesa a fannin ilimin yara a Kwalejin Kimiyyar Kimiyya ta Jami'ar Seoul wacce ba ta da furofesoshi. Ya yi aiki a matsayin mataimakin shugaban kungiyar likitocin Seoul Metropolitan, kuma shugaban kwamitin manufofin kiwon lafiya na kungiyar lafiya ta Namjosun, amma an kama shi sau biyu saboda shiga kungiyar hagu. Daga watan Janairun 1946, lokacin da yunkuri na adawa da kulawa ya zama rikici na zamantakewa, malaman jami'a sun yanke shawarar kada su shiga cikin harkokin siyasa, wanda Yoon Il-sun ke jagoranta a lokacin, amma Lee Byung-nam ya zama masanin kiwon lafiya na farar hula a gefen hagu.