(Alan Griffiths, 11 June 2019) This photograph was taken by Kusakabe Kimbei. I'm indebted to Kjeld Duits for this information.
This photograph was published in vol. III of Captain Francis Brinkley (ed.), 1897, Japan: Described and Illustrated by the Japanese, (Boston: J.B. Millet) with the title "Cherry Blossoms at Koganei".