I had the honor of participating in JAMSTEC's young talent training project, the GACHINKO FIGHT Voyage, having been selected for the 1,618th dive of the deep submergence research vehicle, the SHINKAI 6500. Taking part in deep-sea research enabled me to obtain invaluable experience and enhance motivation for studies. I would like to share what I felt in the deep sea, as well as my thoughts on ocean research and manned deep-sea research.