An image formation device comprises imaging units creating toner images in a corresponding color; an intermediate transfer body where the toner images are overlaid in a primary transfer; a secondary transfer unit performing secondary transfers of the overlaid toner images onto a recording sheet; a first misregistration correction unit operable to cause each imaging unit to form a reference pattern, execute a first misalignment reading acquisition process of acquiring a misalignment reading for each pattern, and adjust the imaging units to correct the readings; a storage unit storing the readings; and a second misregistration correction unit operable to cause an imaging unit subset to form reference patterns, execute a second misalignment reading acquisition process of acquiring readings for the subset of patterns and estimating readings in colors for which no pattern is formed from the acquired readings and the stored readings, and adjust the imaging units to correct all readings.