In order to study with the use of core samples to be obtained during Expedition 337, in situ subseafloor environment has been developed in the laboratory. For the maximum use of the new facility, fresh and high-quality core samples are required. Furthermore, during Expedition 337, mud-gas and cuttings contained in drilling mud collected on board by riser drilling are to be monitored minutely and continuously which will be used as valuable data to reproduce the actual environment.

　To explore the possibility of CCS (Carbon Capture and Storage) by which carbon dioxide is captured and stored within subseafloor strata is also expected as one of the big outcome in this project. ‘Given Japan’s geographical conditions, subseafloor lignite coal layers can become a very effective space as a storage place for carbon dioxide. In addition, we think that metabolic activities of microbes can process carbon dioxide into energy substrates, such as methane (natural gas) and organic matters. If this ‘Bio CCS’ hypothesis is proven, it should be possible to utilize lignite coal layers as ‘Subseafloor Forests’, Dr. Inagaki explains. The new geo-bio-engineering approach new challenge for scientific ocean drilling, such as developing energy processing and cycle technology by utilizing biological activities below seafloor, has received significant interest, including future collaboration with the industrial circles.