But lung diseases such as spinal caries and tuberculosis began to undermine his body, and Ryusei, whom Bosha respected as his mater, passed away, bringing him to seriously focus on the field of haikai (a popular style of Japanese linked verse).
しかし虚子門や脊椎カリエスや結核といった肺患に身体が蝕まれていき、師と尊崇していた劉生も死去してしまったこともあり、俳諧の道へ本格的に専念するようになる。