Formation of the TRAPPIST-1 system: We investigate the formation of the TRAPPIST-1 system in a disk evolving with disk winds. We reproduced the mass distribution of the TRAPPIST-1 system. Ogihara et al. (2022, A&A) [arXiv]. A 5-minute video summary can be found here.

Water delivery to the TRAPPIST-1 system: I wrote a news and views article for nature astronomy on the water delivery to the TRAPPIST-1 system (Raymond et al. 2021). Ogihara (2021, nature astronomy) [nature astronomy].

Formation of giant planets with large metal masses and metal fractions: We explained the origin of the large metal masses and metal fractions of warm Jupiters by considering a rapidly dissipating disk. Ogihara et al. (2021, A&A) [A&A]. A 6-minute video summary can be found here.