・ 音 ヒャク
Sino-Vietnamese: bách
白 (white) wearing a 一 (one) on its head: one white sheet stands for a hundred. The 一 on top marks the leap to three digits.
Stroke data: KanjiVG (CC BY-SA 3.0) — kanjivg.tagaini.net
このペンは百円です。 (このぺんはひゃくえんです)
This pen is 100 yen.