also: いっしゅうき
noun
first anniversary of a person's death
Refers to the first Buddhist memorial service held one year after death. 一周忌 (いっしゅうき) is the more common term.
See also: 一周忌
父の一回忌の法要を営んだ。
We held a memorial service for the first anniversary of my father's death.
Compound of 一 (one), 回 (counter for occurrences), and 忌 (mourning, anniversary of death). The reading いっかいき follows regular sound changes.