末期養子

まつごようし

noun

•

deathbed adoption of a successor (to prevent extinction of the family line), person adopted by someone on his deathbed(yojijukugo)

末	end, close, tip, powder, posterity
期	period, time, date, term
養	foster, bring up, rear, develop, nurture
子	child, sign of the rat, 11PM-1AM, first sign of Chinese zodiac