In this seminar we discuss the branching ratios of stopped K^- absorption on light nuclei in order to clarify the low-energy antikaon-nucleon interaction. We investigate the mesonic (K^- “N” -> pi Y) and non-mesonic (K^- “N N” -> Y N) absorption processes of the stopped K^- -light nucleus systems. Here we consider deuteron and helium-4 as the K^- absorption targets with realistic wave functions for them, and calculate the branching ratios to compare with the experimental results. We also give several theoretical interpretations of the branching ratios, especially from viewpoint of the Lambda(1405) structure.