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This paper describes the current status of Advanced Land Observing Satellite-4 (ALOS-4) which will carry L-band SAR system, namely Phased Array-type L-band Synthetic Aperture Radar-3 (PALSAR-3) and SPace based Automatic Identification System for ships Experiment (SPAISE3). In particular, its mission and characteristics of both instruments; PALSAR-3 and SPAISE3 are shown.