Letters and records, six volumes (letters related to Ryoma SAKAMOTO and records of his company Kaientai), and four relics (hanging scroll paintings of plums and camellias stained with the blood of Ryoma SAKAMOTO, a folding screen decorated with calligraphy and painting fragments, a tissue pouch used by Ryoma SAKAMOTO, and formal kimono with a family crest (black habutae silk)).
書状・記録類6巻（坂本龍馬関係書状類、海援隊日史等）、遺品類4点（血染掛軸、書画貼交屏風、三徳、黒羽二重紋服）