He had an IAmA thread on Reddit and someone asked about BoA. (Momoyome who is pretty active on here too haha)
The question was "Have you met BoA? Whats she like? What does she smell like?" to which he answered: "She smells like the ocean. She is divine and a very nice person haha."
Not sure if worthy of a post but thought it was interesting. He also answers a lot of other questions so check out the rest of the thread if interested.