A Study of Apalutamide in Chinese Participants With Non Metastatic Castration Resistant Prostate Cancer (NM-CRPC)

Inclusion Criteria: * Histologically or cytologically confirmed adenocarcinoma of the prostate without neuroendocrine differentiation or small cell features, with high risk for development of metastases, defined as prostate-specific antigen doubling time (PSADT) less than or equals to (\<=) 10 months. PSADT is calculated using at least 3 prostate-specific antigen (PSA) values obtained during continuous androgen deprivation therapy (ADT) * Castration-resistant prostate cancer (PC) demonstrated during continuous ADT, defined as 3 PSA rises at least 1 week apart, with the last PSA greater than (\>) 2 nanogram per milliliter (ng/mL) * Surgically or medically castrated, with testosterone levels of less than (\<) 50 nanogram per deciliter (ng/dL). If the participant is medically castrated, continuous dosing with gonadotropin releasing hormone analog (GnRHa) must have been initiated at least 4 weeks prior to randomization and must be continued throughout the study to maintain castrate levels of testosterone * Participants who received a first-generation anti-androgen (example: bicalutamide, flutamide, nilutamide) must have at least a 4-week washout prior to randomization and must show continuing disease progression (an increase in PSA) after washout * At least 4 weeks must have elapsed from major surgery or radiation therapy prior to randomization Exclusion Criteria: * Presence of distant metastases, including central nervous system (CNS) and vertebral or meningeal involvement, or history of distant metastases. Exception: Pelvic lymph nodes \<2 centimeter in short axis (N1) located below the iliac bifurcation are allowed * Symptomatic loco-regional disease requiring medical intervention, such as moderate or severe urinary obstruction or hydronephrosis, due to primary tumor (example, tumor obstruction of bladder trigone) * Prior treatment with cytochrome P450 17 alpha-hydroxylase/17,20-lyase (CYP17) inhibitors (example: abiraterone acetate, orteronel, galerterone, ketoconazole, aminoglutethimide) for PC * Prior chemotherapy for PC, except if administered in the adjuvant/neoadjuvant setting * Prior treatment with second generation anti-androgens (example, enzalutamide) * History of seizure or condition that may pre-dispose to seizure (example: prior stroke within 1 year prior to randomization, brain arteriovenous malformation, schwannoma, meningioma, or other benign CNS or meningeal disease which may require treatment with surgery or radiation therapy)