This group (Kallahan, Kalanguya, Kadasan, Ikalasan, Kalasan) may be found in Imugan and Kayapa in the provinces of Nueva Vizcaya and Benguet living in mid-mountain forests of tropical oak, hence their ascribed name. Segments of this population may be found in the province of Ifugao where they are known as Kalanguya, speaking dialects like Keleyi. This group is concentrated in the southwestern corner of Ifugao. The national population is some 34,000 (Rice 1974).

       Like the Ifugao, the preferred food is taro even if the sweet potato is the staple, and rice the prestige food. Planting is done in low terraced fields along mountain drainage systems and valley flood plains. Pig raising is one of the more important occupations. In the town of Imugan and the surrounding villages about Sta. Fe, Nueva Vizcaya, the population is noted for the production of basketry and brooms.

       Ikalahan culture is characteristically that of the Cordillera with involved rituals and animal sacrifices and prestige feasts (padit) of men which are held for days accompanied by the sacrifice of prescribed sets of animals. Like the I’wak, meat is consumed principally during rituals and is meticulously shared.