A Phase I Study to Investigate the Tolerability and Safety of ONO-4685 Given as Monotherapy in T Cell Lymphoma and CLL/SLL

Who May Qualify: 1. Patients with histopathologically confirmed diagnosis of one of the following subtypes as defined by the 2017 revision of the WHO classification of lymphoid malignancies: Peripheral T-cell lymphoma(PTCL) - Angioimmunoblastic T-cell lymphoma(AITL) - Peripheral T-cell lymphoma, NOS(PTCL-NOS) - Nodal peripheral T-cell lymphoma with TFH phenotype(nodal PTCL with TFH) - Follicular T-cell lymphoma(FTCL) Cutaneous T-cell lymphoma(CTCL) - Mycosis fungoides(MF) - Sezary syndrome Chronic lymphocytic leukemia/small lymphocytic lymphoma(CLL/SLL) 2. Relapsed or refractory patients with tumors for which no established standard therapy is available, or refractory or intolerant to existing standard therapy judged by principal investigator or subinvestigator 3. ECOG PS 0\~2 4. expected to live at least 3 months Who Should NOT Join This Trial: 1. Patients with severe complications. 2. Patients with multiple cancers. Always talk to your doctor about whether this trial is right for you.