10 strokes
陛下
heika
His/Her Majesty
天皇陛下
tennō heika
His Majesty the Emperor
両陛下
ryōheika
Their Majesties
Study kanji on LenGaki

Get the Android app
The app adds offline study, home-screen widgets, stroke-order tracing, speaking practice with pronunciation scoring, and an AI tutor that answers questions in context — none of which fits in a browser tab.