Mr. Moto is a character from a series of novels and films that began in the 1930s. Although Mr. Moto is a distinctive name, there are several synonyms that could be used when referring to this iconic character. One synonym might be the "Japanese detective," which would reference Mr. Moto's origins and investigative prowess. Another possible synonym could be "master sleuth," which would highlight Mr. Moto's ability to solve even the most difficult cases. Finally, a more casual synonym might be simply "Moto-san," which would use the honorific "san" to show respect for Mr. Moto's Japanese culture and traditions.