Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_56 (method VARCHAR, res VARCHAR, opponent VARCHAR)
### Question:
What method was used that had a resulting win against opponent, Natsuko Kikukawa?
### Answer:
SELECT method FROM table_name_56 WHERE res = "win" AND opponent = "natsuko kikukawa"