A Study of Teclistamab in Japanese Participants With Relapsed or Refractory Multiple Myeloma

Inclusion criteria: * Documented diagnosis of multiple myeloma (MM) according to International Myeloma Working Group (IMWG) diagnostic criteria * Participant must have measurable disease defined by any of the following: Serum M-protein level greater than or equal to (\>=) 1.0 gram per deciliter (g/dL); Urine M-protein level \>= 200 milligrams per 24 hours (mg/24 hours); or Light chain MM, for participants without measurable disease in the serum or urine: serum Ig-free light chain (FLC) \>=10 milligrams per deciliter (mg/dL) and abnormal serum Ig kappa-lambda FLC ratio; or if central laboratory assessments are not available, relevant local laboratory measurements must exceed the minimum required level by at least 25 percent (%) * Participant must be relapsed or refractory to established therapies with known clinical benefit in relapsed/refractory MM or be intolerant to established MM therapies and a candidate for teclistamab treatment in the opinion of the treating physician. Prior lines of therapy must include a proteasome inhibitors (PI), an immunomodulatory drug (IMiD), and an anti-CD38 antibody in any order during the course of treatment. Participants who could not tolerate PI, immunomodulatory drugs, or anti-CD38 antibody are allowed * Eastern Cooperative Oncology Group (ECOG) performance status grade of 0 or 1 at screening and immediately before the start of study treatment administration * Woman of childbearing potential must have a negative pregnancy test at screening…