Kitakami Tenshochi is known as one of the 3 major cherry blossoms spots in Tohoku region by Japanese. Others are Hirosaki and Kakunodate.
You can see cherry blossoms in the 3 major spots at the same period.
Cherry blossoms festival at the site features Japanese ferryboat across Kitakami river, lots of carp streamers and touristic carriage
Kitakami Tenshochi Official Website