As he delved deeper, Hayashi located several senior officers of the 5th Volunteers and traveled to Taiwan to talk with war survivors, collecting their accounts in his book The 5th Takasago Volunteers: Register of Names, Military Savings, Japanese Testimonies.
循線追蹤，林榮代又找到第五回義勇隊的部分長官及訓練警官，並親自到台灣找到參與過戰事的倖存者，按照他們的口述整理成《第五回高砂義勇隊﹘﹘名簿、軍事儲金、日本人證言》專書。