Since Ikai as an honor stipulated in the Constitution of Japan is conferred posthumously, it is usually conferred on Sanken-no-cho (chiefs of three organization of powers), who rendered distinguished services such as a prime minister, after their death.
日本国憲法に規定される栄典としての位階は死没時に叙位されるため、内閣総理大臣など三権の長として功労ある者が死後に受けることが多い。