The main aim of this study is to check how well healthy adults can tolerate TAK-881 with different dosing schedules.

During the study, participants will receive one infusion of TAK-881 under the skin (subcutaneous [SC] infusion) on Day 1 at a lower dose level followed by participants receiving multiple infusion of higher dose levels.

Participants will be in the study for approximately 19 weeks including screening period and follow-up (End of Treatment [EOT]).

Inclusion Criteria:

1. Men and Women between 18 and 50 years can participate.
2. Must be a non-smoker, with no use of nicotine or tobacco products for at least 3 months prior to the first dosing.
3. Must have Body Mass Index (BMI) between 18.0 and 30.0 kilograms per square meter (kg/m^2).
4. Must be medically healthy.
5. Must follow protocol-specified contraception guidance.

Exclusion Criteria:

1. Any current or past medical history of blood/clotting disorder, liver, lung, heart, kidney, immune, skin, or brain or psychiatric condition.
2. History of alcohol or drug abuse within 2 years before dosing.
3. History or presence of hypersensitivity or severe allergic reactions to blood or blood components.
4. History or presence of thrombotic/thromboembolic events, or venous thrombosis.
5. Pregnant or breastfeeding.
6. Unable to refrain from taking prescription and non-prescription medications, herbal remedies, homeopathic preparations, or vitamin supplements.
7. Recently donated blood or blood products.
8. Participated in another clinical trial involving immunoglobulin products within 12 months of screening.
9. Has taken biologic agents within 12 weeks of screening.
10. Has used an investigational product within 30 days or 5 half-lives, whichever is longer, prior to screening.
11. Has received any vaccine (including live attenuated vaccines and coronavirus disease 2019 [COVID-19] vaccines) during the last 30 days before dosing.

Takeda provides access to the de-identified individual participant data (IPD) for eligible studies to aid qualified researchers in addressing legitimate scientific objectives (Takeda's data sharing commitment is available on https://clinicaltrials.takeda.com/takedas-commitment?commitment=5). These IPDs will be provided in a secure research environment following approval of a data sharing request, and under the terms of a data sharing agreement.

IPD from eligible studies will be shared with qualified researchers according to the criteria and process described on https://vivli.org/ourmember/takeda/. For approved requests, the researchers will be provided access to anonymized data (to respect patient privacy in line with applicable laws and regulations) and with information necessary to address the research objectives under the terms of a data sharing agreement.