The Coughing at Ikedaya: When Did Okita Sōji Find Out He Was Dying?

On the night of July 8, 1864 (the fifth of the sixth month of Genji 1), on the second floor of the Ikedaya inn west of Sanjō Bridge in Kyoto, Shinsengumi first-captain Okita Sōji was fighting Chōshū, Tosa, and Higo loyalists. The indoor engagement ran roughly two hours. Partway through, Okita coughed up blood on the staircase and had to withdraw. Nagakura Shinpachi's Shinsengumi Tenmatsuki records the moment in a brief sentence — the first contemporary documentary trace of Okita's illness.

What Blood From the Mouth Meant

Coughing of blood was the recognized leading symptom of tuberculosis in the medicine of the period. Edo-era Japanese medicine called the disease rōgai and treated it as essentially untreatable. When the news of Okita's coughing spread inside the Shinsengumi, the unit took no formal action, but Kondō Isamu, Hijikata Toshizō, Nagakura Shinpachi, and the other senior figures understood that his combat capacity had a limit. Okita himself understood his condition. He refused to step away from front-line duty.

Three Years With the Disease

From Ikedaya until around 1867, Okita took part in nearly every major Shinsengumi action: the Kinmon Incident in July 1864, the kaishaku for Yamanami Keisuke's seppuku in 1865, the assassination of Itō Kashitarō in November 1867, and other engagements. The coughing attacks became more frequent. By 1867 he was being kept out of combat assignments; his role within the unit shifted gradually toward sword instruction and the training of younger captains.

Why It Surfaced at Ikedaya

Whether Okita's tuberculosis pre-dated Ikedaya cannot be conclusively determined, but it is very likely that the extreme physical demand of a long indoor sword fight brought a latent infection into the open. The medicine of the period understood tuberculosis as a disease whose symptoms surfaced under malnutrition, exhaustion, and temperature stress — all of which an indoor summer fight in Kyoto satisfied. Those two hours at the Ikedaya were the night that bent the late-Bakumatsu political timeline; they were also the night that left a permanent mark on the body of the most gifted swordsman in the Shinsengumi.

"Okita Sōji collapses. He has coughed blood."