This article examines the linguopragmatic functions of directive speech acts realized through interrogative forms in Japanese business discourse. In commercial and professional communication, speakers frequently ask an addressee to perform a specific action, provide an answer, wait, call back, supply information, or clarify a deadline. In Japanese, such directive intentions are rarely realized through direct imperative structures; rather, they are conventionally encoded through fixed interrogative request formulas. Based on indirect interrogative constructions used in Japanese corporate interaction, the study identifies their key pragmatic functions: soliciting action, mitigating illocutionary force, maintaining business etiquette, and preserving the addressee’s negative face by leaving a formal possibility of refusal. The analysis demonstrates that interrogative forms in Japanese business discourse function not merely as instruments of information seeking but as highly conventionalized indirect directive devices.