An isolated rock in Ceylon. It was evidently named after the senāpati Subha, who built a fortress there in the time of Māgha (Cv.lxxxi.3).
Later, it was occupied by Bhuvanekabāhu (brother of Vijayabāhu IV.), and formed the centre of the campaign in the battle of Vijayabāhu IV. against Candabhānu.
Later, Bhuvanekabāhu continued to live there (Cv.lxxxviii.26, 61, 64 f., 79). After Vijayabāhu IV. was killed by his senāpati Mitta, Bhuvanekabāhu, who had succeeded to the throne at Jambuddoni, had once more to seek refuge in Subhagiri, and for some time it was the seat of government. A town seems to have grown up there in the same way as at Sīhagiri (Cv.xc.11, 28, 30, 35).
Bhuvanekabāhu himself ruled there for eleven years (Cv.xc.42). After his death, Ariyacakkavatti laid waste the town (Cv.xc.45), and the capital was later moved to Hatthigiri(sela)pura (Cv.xc.59).
Subhagiri is identified with the modern Yāpahu, near Maho. Cv.Trs.ii.135, n.3.