This study aimed to develop a Japanese version of the strengthspotting scale and examine the relationship between strengthspotting and relationships with others, as well as factors that related to an interpersonal relationship. A Japanese version of strengthspotting scale was developed and administered with six other scales of interpersonal factors to 264 college students. The results indicate that the Japanese version of strengthspotting scale has sufficient reliability and validity. Furthermore, the results revealed a relationship between each of the five domains of strengthspotting and interpersonal factors: communication skills, affiliation motives, shyness, optimism and pessimism, and positive relationships with others. The study provides a basis for conducting further empirical research and practice on strengthspotting in Japan.