・ 音 オク
Sino-Vietnamese: ức
亻(person) for meaning, 意 for sound: people beyond counting. One 億 is a hundred million — the biggest common counting unit in Japanese.
Stroke data: KanjiVG (CC BY-SA 3.0) — kanjivg.tagaini.net
日本の人口は一億人以上です。 (にほんのじんこうはいちおくにんいじょうです)
Japan's population is over one hundred million.