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億， おく
1. hundred million, 100,000,000, 10^8
亿
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以上， 已上， いじょう
1. not less than ..., ... and over, ... and above, ... and upwards, ... or more
2. beyond (e.g. one's expectations), above, more than, further than
3. the above, the above-mentioned, the aforementioned, the foregoing
4. since ..., seeing that ..., no...
至少，以上；超出；前述，上述(用于一段话的结束)；结束，终(用于文章、条文结尾)；既然；就这样(用于活动或讲话结束)
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
