Returned Ryugu samples from the Phase2 curation "Team KOCHI"

Ryugu samples were returned from the Phase2 curation "Team KOCHI" (JAMSTEC Kochi Core Research Institute), which had allocated as the first phase of Ryugu sample distribution.

The team has published the papers on Ryugu samples as below (as of June 30, 2023):

• Ito et al., A pristine record of outer Solar System materials from asteroid Ryugu’s returned sample., Nature Astronomy, doi.org/10.1038/s41550-022-01745-5
• Liu et al., Incorporation of 16O-rich anhydrous silicates in the protolith of highly hydrated asteroid Ryugu., Nature Astronomy, doi.org/10.1038/s41550-022-01762-4
• Greenwood et al., Oxygen isotope evidence from Ryugu samples for early water delivery to Earth by CI chondrites., Nature Astronomy, doi.org/10.1038/s41550-022-01824-7
• McCain et al., Early fluid activity on Ryugu inferred by isotopic analyses of carbonates and magnetite., Nature Astronomy, doi.org/10.1038/s41550-022-01863-0
• Yamaguchi et al., Insight into multi-step geological evolution of C-type asteroids from Ryugu particles., Nature Astronomy, doi.org/10.1038/s41550-023-01925-x
• Tomioka et al., A history of mild shocks experienced by the regolith particles on hydrated asteroid Ryugu., Nature Astronomy, doi.org/10.1038/s41550-023-01947-5