This paper explores features of interaction that facilitate pragmatic development, especially in the use of receipts (e.g., soo desu ne [That’s true], soo soo [That’s right]) in Japanese as a second language. Ordinary social interactions were video-recorded monthly during a learner’s one-year study-abroad. Conversation analysis of the data reveals that, while no explicit corrective feedback was provided to the learner’s receipts, his interlocutor’s next-turn action afforded implicit feedback on how his receipt was interpreted, and provided him with an opportunity to perform more competent receipting actions. Moreover, the interlocutor’s utterances served as models that the learner could use subsequently.