Akira is married to Hideo, and they have a son named Kenji. Akira has one brother, Daichi, who is married to Fumiko. Daichi and Fumiko have two children, a daughter named Harumi and a son named Isamu. How is Fumiko related to Hideo, and how is Harumi related to Kenji? Provide a very short response.
Fumiko is married to Daichi, who is the brother of Akira, Hideo's wife. This makes Fumiko Hideo's sister-in-law.

Harumi is the daughter of Daichi and Fumiko. Daichi is the brother of Akira, who is Kenji's mother. This makes Harumi Kenji's first cousin, as their parents are siblings.