Short-term intercultural exchange programs provide a wealth of information and experiences for participants. Participants are given the opportunity to travel out of their native country and are exposed to new languages and cultures. This case study looks at the Japanese sojourners in the Northwest/ Pacific Rim {NWPR) summer program. The purpose was to examine the language use of the Japanese sojourners throughout the course of the NWPR program. This case study sought to determine when the Japanese sojourners used English and/or Japanese, in which situations, what strategies the Japanese sojourners employed and who initiated contact with whom. All of the data was gathered from a participant observer who also employed various ethnographic methods. The Japanese sojourners were observed informally and six were interviewed formally. All four of the ESL teachers were also formally interviewed to provide as wide a range of information as possible. The results showed that the Japanese sojourners did, in general, have a positive experience in the NWPR program but they did not learn as much English and intercultural sensitivity as they could have. Although this case study was focused on the language use of the Japanese sojourners aspects of program evaluation inevitable infiltrated in.