We are happy to inform the C-DEBI community that deep biosphere samples from IODP Exp. 366 and Exp. 370 are now available to all scientists. Exp. 366 cored the summits and flanks of serpentinite mud volcanoes on the forearc of the Mariana system. The aim of exp. 370 was to study the relationship between the deep subseafloor biosphere and temperature. The major subject of these two expeditions was the deep biosphere, and samples are kept in good condition. Microbiologists will be interested. The information about the samples was updated on our website, http://www.kochi-core.jp/DeepBIOS/, and interested scientists can also contact sample curator Nan Xiao (email@example.com) directly for assistance in submitting sample requests.