Below you can find the Upon his death in 1989 he had served as emperor 62 years the longest reign in japanese history Jeopardy Words Answer. The answer to Upon his death in 1989 he had served as emperor 62 years the longest reign in japanese history has 8 letters. This clue belongs to the Japanese history category and is part of Jeopardy Word Level 523. If you scroll near the bottom you will find other clues and answers part of level 523