Write questions on post-it notes that you’d like students to ask you. Then, during break times you can stand in the hallway near areas where students congregate and hand them to curious students. Signal them to ask you the question. After they have initiated the conversation with the question, you can take it where ever you want to go.
As you’ve probably noticed, Japanese students tend to bunch up in groups when talking in the hallways. You can use this to your advantage in two ways. One, if they don’t know how to answer a question, usually their friend can give them advice. Two, after they have talked with you, they can ask each other.
What are your ideas for getting more communication in with your students?