Tokyo stocks are at fifteen-year highs and the yen at eight-year lows, but Bank of Japan Governor Haruhiko Kuroda told CNBC he doesn't think a bubble is brewing nor is he worried about where the yen is headed.

"We don't think there is any asset bubble or stock market bubble, but we will continue to monitor carefully," BOJ governor Haruhiko Kuroda told CNBC in an exclusive interview. As for the Japanese currency, the "yen might appreciate. But I think the exchange rate, including the yen, should move in line with economic fundamentals," he said.