Many organizational silences exist in Japanese workplaces. Pluralistic ignorance is a mechanism of organizational silence that occurs when members of an organization recognize discrepancies between their opinions and that of others. Specifically, new graduate workers would keep silent to avoid conflict with the others' opinion in adapting themselves to their organization. This study examines new graduate workers' possible pluralistic ignorance in Japanese organizations. A web survey was conducted on 90 Japanese new graduate workers (35 males, 54 females, and one participant who did not indicate gender). The average age was 23.02 (range 19-26). The survey contained questions on five workplace behaviors (i.e., taking a moderate rest out of break times, going home at the fixed time, proposing improvement, refusing an additional task, and obeying the regular procedure). Participants responded by either agreeing or disagreeing to each behavior on a 9-point scale. For the same behaviors, they inferred the degree of agreement by Japanese society and their organization on a 9-point scale. We conducted ANOVAs on each behavior in which attitude (participant vs. the Japanese society vs. their organizations) is the independent variable, and attitude score (degree of agreement for a behavior) is the dependent variable. The results revealed that the scores of the Japanese society and their organizations were significantly lower than their own attitude score for only three behaviors (i.e., taking a moderate rest out of break times, going home at the fixed time, and proposing improvement). The results indicate that new graduate workers' pluralistic ignorance could occur, depending on the kind of behavior.