Jitsuzan (Shigemoto) TACHIBANA (the second eldest brother) was a close associate of Mitsuyuki KURODA and, was kept on after Mitsuyuki retired in the role of 御納戸 (senior advisor/manager).
次兄・立花実山（重根）は黒田光之の側近で、光之隠居後も御納戸頭として近侍した。