Passage: An Air manga was serialized in the Japanese computer game magazine Comptiq between August 10, 2004, and February 10, 2006. The individual chapters were later collected into two separate volumes published by Kadokawa Shoten. The story was adapted from the visual novel version that preceded it, and was illustrated by Japanese artist Yukimaru Katsura. Between the two volumes, there are 15 main chapters (nine in volume one and six in volume two), and two bonus chapters included at the end of each volume. The manga version goes through the Dream and Air arcs in detail while the Summer arc is only touched upon briefly throughout the manga. The main focus is on Misuzu's story with Kano and Minagi serving as minor characters in comparison. However, Minagi's story is explained in the bonus installment at the end of volume two.There are also five sets of manga anthologies produced by different companies and drawn by a multitude of different artists. The first volume of the earliest anthology series, released by Ichijinsha under the title Air Comic Anthology, was released on January 25, 2001, under their DNA Media Comics label. Volumes for this series continued to be released until December 25, 2001, with the seventh volume. The second anthology, Air Anthology Comic, was released in a single volume by Softgarage on December 20, 2002. On April 17, 2004, Ohzora released an anthology composed of works based on both Kanon and Air titled Haru Urara: Kanon & Air. Ohzora also released three other anthologies under the title Air, the last of which came out on March 24, 2005. The last manga anthology was released as a single volume on April 2, 2005, by Jive titled Comic Anthology Air: Kimi no Iru Basho. Each of the anthology series are written and drawn by an average of 20 people per volume.

Question: What type of publication was released by Ohzora?
an anthology