Space One's KAIROS F3 mission launched on March 5, 2026, from Spaceport Kii in Kushimoto, Japan, carrying the TATARA-1R Earth observation satellite as its primary payload along with four secondary payloads. The mission was designated to deliver these satellites into orbit to support Earth imaging and monitoring operations. The loss of TATARA-1R and the accompanying payloads represented a significant setback for multiple organizations relying on these space assets.

The KAIROS vehicle is a solid-fueled rocket developed by Space One, a Japanese commercial spaceflight company seeking to establish a domestic launch capability. This was the third flight of the KAIROS system from Spaceport Kii, Japan's emerging commercial spaceport located in Wakayama Prefecture. The vehicle is designed as a small-lift launch system targeting the growing small satellite market.

The launch failed during ascent, resulting in the loss of all payloads. This failure marked another significant setback for Japan's emerging commercial space launch sector, which has faced challenges in achieving reliable operations. The incident underscored the technical difficulties inherent in developing new launch systems and highlighted the competitive pressures facing Japan's efforts to establish a sustainable small-lift launch industry against international competitors.