CREATE TABLE table_204_623 (id DECIMAL, "opponent" TEXT, "goals" TEXT, "wins" DECIMAL, "draws" DECIMAL, "losses" DECIMAL, "+- goals" DECIMAL, "matches" DECIMAL, "qualified" DECIMAL, "eliminated" DECIMAL)

which is before ks tomori
SELECT "opponent" FROM table_204_623 WHERE id = (SELECT id FROM table_204_623 WHERE "opponent" = 'ks tomori') - 1
SELECT "opponent" FROM "table_204_623" WHERE "id" = (SELECT "id" FROM "table_204_623" WHERE "opponent" = 'ks tomori') - 1