The traditional spring Asia Week started this weekend in New York. This is the opportunity to walk in many galleries you usually need an appointment for. Participating galleries are listed at asiaweeknewyork.org, asianartdealersny.com and jada-ny.org. The New York Times highlighted these tightly focused exhibitions: MD Flacks’s 18th-century Chinese boxes, stands and trays carved from zitan (a black hardwood, pronounced zih-TAHN); Mika Gallery’s rough Japanese clay vessels and figurines that date back to 3500 B.C.; and Sebastian Izzard’s celadon lobed bowls and ridged vessels from 12th-century Korea.