“Unrivaled Splendor: The Kimiko and John Powers Collection of Japanese Art,” at the Museum of Fine Arts, Houston, highlights the singular taste of the couple, who, starting in the 1960s, amassed what is now considered to be the most exquisite array of Japanese antiquities in private hands. Among the 85 examples on display is a gleaming circa-1635 screen with verse on gold leaf (above). June 17–September 23, mfah.org