CREATE TABLE table_71908 ("Year" FLOAT, "Men's singles" CLOB, "Women's singles" CLOB, "Men's doubles" CLOB, "Women's doubles" CLOB, "Mixed doubles" CLOB)

Which year did Aya Ohori play in the Women's Singles?
SELECT "Year" FROM table_71908 WHERE "Women's singles" = 'aya ohori'
SELECT "Year" FROM "table_71908" WHERE "Women's singles" = 'aya ohori'