In Natsuko Buurstra's Japanese 4 class, a student listens intently as her discussion partner describes a scene from Harry Potter. It is a conversation that might be overheard in any school across the country, except that this one is conducted entirely in Japanese.  Like all World Languages teachers at Princeton Regional Schools, Buurstra holds class exclusively in the target language, no easy feat when teaching Japanese, which is considered a Category IV, or among the most difficult of languages for native-English-speakers to learn, by ACTFL (American Council on Teaching of Foreign Languages). Students of Princeton Regional Schools, one of the few districts in New Jersey to offer Japanese, will continue to benefit from Buurstra's teaching talents, thanks in part to a grant by the Japan Foundation. With headquarters in Tokyo and offices in 21 countries around the world, the organization supports cultural exchange, Japanese language education oversees, as well as Japanese studies and intellectual exchange. As a recipient of a two-year award from the Los Angeles office of Japan Foundation, PRS is able to sustain a Japanese-language program that has grown from its humble beginnings as a handful of distance-learning classes to a four-year course of studies spanning beginning to AP Japanese.   For Buurstra, her two assistants, Kaori Otsubo and Mamiko Benedict, and their students, Japan Foundation's support helps them pursue their common passion: a love for the language and culture of Japan.  Their efforts have yielded some impressive results. Last year, three students who had started as freshmen not speaking a word of Japanese were so advanced by their junior year that they sat for the AP exam. With two of the students scoring a 5 and one a 4, they went on to attend courses at Princeton University this year. Buurstra is impressed by all of her students' abilities. “I have great students who are very interesting and eager to learn about my beloved country, Japan, its language and culture,” Buurstra notes. Her enthusiasm, which she passes on to her students on a daily basis, is what keeps the conversations flowing.