Trial of the Safety and Efficacy of Epcoritamab in Japanese Subjects With Relapsed or Refractory (R/R) B-Cell Non-Hodgkin Lymphoma (R/R B-NHL)

All participants in the trial will receive epcoritamab, as monotherapy or in combination with SOC. The following regimens will be investigated in Part 2: Arm 1: epcoritamab monotherapy in relapsed/refractory (R/R) diffuse large B-cell lymphoma (DLBCL) and follicular lymphoma (FL) Arm 2: epcoritamab + rituximab and lenalidomide (R2) in participants with R/R FL Arm 3: epcoritamab + rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP) in participants with previously untreated DLBCL with high risk features Arm 4: epcoritamab + gemcitabine and oxaliplatin (GemOx) in participants with R/R DLBCL who either failed prior autologous hematopoietic stem cell transplantation (ASCT), or are ineligible for autologous HSCT. Arm 5: epcoritamab maintenance in participants with FL who achieve a CR or a PR following first line (1L)/second line (2L) SOC treatment