Efficacy and Safety of Maridebart Cafraglutide in Adult Participants in Japan Who Have Obesity Disease

Inclusion Criteria: * Age ≥ 18 years. * History of at least 1 self-reported unsuccessful attempt at weight loss by diet and exercise. * Body mass index (BMI) ≥ 35 kg/m\^2 at screening with a current diagnosis of at least 1 of the weigh-related comorbidities specified in the Japan Society for the Study of Obesity (JASSO) guideline OR BMI ≥ 27 kg/m\^2 to \< 35 kg/m\^2 at screening, with a current diagnosis of at least 2 of the weight-related comorbidities specified in the JASSO guideline. * For both BMI categories, at least 1 of the weight-related comorbidities must be hypertension, dyslipidemia, or T2DM according to the definitions below: 1. hypertension: treated, or with SBP ≥ 140 mmHg, or DBP ≥ 90 mmHg at screening. 2. dyslipidemia: treated, or with LDL \> 140 mg/dL (3.6 mmol/L), or triglycerides ≥ 150 mg/dL (1.7 mmol/L), or non-HDL cholesterol \> 170 mg/dL (4.4 mmol/L) or HDL \< 40 mg/dL (1.0 mmol/L) at screening. 3. T2DM: diagnosed ≥ 180 days before screening, and treated with diet and exercise alone and/or a stable treatment for at least 90 days before screening with up to 3 oral glucose-lowering medications (as per local labeling) (except for glucagon-like peptide-1 receptor agonists \[GLP-1RA\] and dipeptidyl peptidase-4 \[DPP-4\] inhibitors), and have a HbA1c ≥ 7% and ≤ 10% (53-86 mmol/mol) at screening. * In the opinion of the investigator, well-motivated and willing to: 1. Follow study procedures for the duration of the study, including, but not limited to, follow lifestyle advice, maintain a study log(s)/diary(ies), and complete required study visits and questionnaires. 2. Perform self-monitoring blood glucose (SMBG) per protocol (only for participants with T2DM). Exclusion Criteria: * Obesity induced by other endocrinological disorders or monogenetic or syndromic forms of obesity. * Self-reported change in body weight \> 5 kg within 90 days before screening. * Previous or planned (during the study) surgical, endoscopic, or device-based treatment for obesity. * For participants without diabetes at screening, type 1 or 2 diabetes mellitus or any other types of diabetes mellitus (except history of gestational diabetes). * For participants with T2DM at screening, any other type(s) of diabetes mellitus except T2DM. * History of chronic pancreatitis or history of acute pancreatitis within 180 days before screening. * Family (first-degree relative\[s\]) or personal history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia syndrome type 2 (MEN-2). * History of unstable major depressive disorder (MDD) or other severe psychiatric disorder within 2 years before screening. * Lifetime history of suicide attempt.