Now at the Academy is the first glimpse of the Richard Lane Collection, which the Academy acquired in 2003. It’s a hoard of Japanese art and as a team of experts go through it, delightful discoveries are being made. Scott Johnson, professor at Kansai University in Osaka and a Japanese art-history scholar, curated this first exhibition of works from the collection. He was in town last week to work with the Academy’s Asian Art Department and took a little time to talk about some works in “Richard Lane and the Floating World,” on view in Gallery 14 through Feb. 1.