SPS.
“If we can demonstrate our technology ahead of the rest of the world, it will also be a bargaining tool for space development with other countries”
(if you hit a limit on nikkei.com… try: https://www.engadget.com/japan-will-try-to-beam-solar-power-from-space-by-2025-214338244.html … but first try another browser because the nikkei.com article has the most full story)