Polzella et al. (1977)'s assumption that to estimate duration left hemisphere relies on a timer, while the right hemisphere relies on a visual information processor was tested using verbal stimuli instead of nonverbal stimuli in their experiment. The hirakanas (Japanese syllabary) varying in number and duration were presented in central (CVF), left (LVF), and right (RVF) visual fields, and their duration were categorically estimated by 24 undergraduates. Half of subjects were required to read aloud presented characters as fast and accurately as possible before they estimated the duration. The number of presented lettes had larger effects on time perception when they were presented in RVF than when presented in LVF. Thus, Polzella et al.'s assumption was adequate whether visual stimuli were verbal or not. In addition to this, when additional reading task was required, visual stimuli were differently perceived in length when they were presented in different visual field. The perceived duration was strongly affected by both number and duration of hirakanas when they were presented in CVF. Latencies for reading aloud presented hirakanas showed that processing time of nontemporal information was not directly related to the perceived duration. The applicability of the two-process model for time perception (Thomas & Weaver, 1975) to these results is discussed.