CREATE TABLE table_203_215 (id NUMBER, "year" NUMBER, "competition" CLOB, "venue" CLOB, "position" CLOB, "event" CLOB, "notes" CLOB)

what year was itoh 's only victory at the 10,000 m distance .
SELECT "year" FROM table_203_215 WHERE "position" = 1 AND "event" = '10,000m'
SELECT "year" FROM "table_203_215" WHERE "event" = '10,000m' AND "position" = 1