Tactics - Kinoshita, Sakura Higashiyama, Kazuko

Meet Kantarou, a folklore scholar living in the Taisho period. Ever since he was a child, he has been able to see and talk to various spirits. But now that Kantarou's all grown up, he moonlights as an exorcist solving the problems of ghosts and demons...all with the help of Haruka, the legendary demon-eating tengu!

(Source: Tokyopop)
This series is on hiatus.

Tactics had eight volumes published in English by Tokyopop, from April 3, 2007 to December 29, 2009, before the publisher became defunct. Previous to that, ADV Manga had published the first two volumes, from October 26, 2004 to May 1, 2005, before they too became defunct.

Digitally, A-Net Digital LLC published three volumes from December 15, 2010 to February 23, 2011, while volumes 1 to 12 were briefly available on JManga, until they closed in May 2013.