Manala Next Door
20 2, 5:33pm
Tengu (as in the kind portrayed here) are commonly said to have been warrior or buddhist monks, who had either been cursed by their peers or become to arrogant and overly confident in their skill, thus transforming into a tengu, explaining why there are only men. This is only one explanation though; others do exist.
Other types of tengu, e.g. the karasutengu, had female counterparts.