A photo from the July 20, 1927 issue of "Asahi Graph".
According to the original caption in English:
"H.I.H. Prince Takamatsu, brother of H.M. the Emperor, is seen in a Navy Avro plane in which His Highness has made first flight at the Kasumigawra Naval Aerodrome on July 5. After which he went through the whole course of flying art during his stay there for a week."