Which Buddha represents the northern direction in the Five Wisdom Buddhas?

The Buddha representing the northern direction among the Five Wisdom Buddhas is Amoghasiddhi.

Amoghasiddhi is one of the five transcendental or Wisdom Buddhas in Mahayana and Vajrayana Buddhism. His name means “Unfailing Accomplishment,” and he represents successful action, the completion of the Buddhist path, and the overcoming of envy. His assigned heavenly quarter is the north.

Amoghasiddhi is commonly shown in green and associated with the air or wind element and the season of autumn. His gesture is often the abhaya mudra, or gesture of fearlessness, expressing protection from danger and freedom from fear. He belongs to the karma family and is traditionally associated with the double vajra.

The other four Buddhas distinguish the directions: Akshobhya is associated with the east, Ratnasambhava with the south, Amitabha with the west, and Vairocana with the center. A frequent error is confusing Amoghasiddhi with Vairocana because both appear in the same mandala system; Vairocana occupies the central position, not the north.