以上(いじょう) ①More than (or equal to), Over・(and) above, Any more・Greater, Exceeding

以上① and いか (written as 以下) both attach to amounts or nouns like それ, but express opposite meanings: 以上① means 'X or more', while いか means 'X or less'. For example, １００円以上 '100 yen or more' vs. １００円以下 means '100 yen or less'. In both cases, the stated number is included. 以上 and 以下 can also refer to earlier or later content in a document.

以上① and 以上に are related patterns that both mean 'more than or equal to', but are used differently. 以上① typically attaches to amounts or nouns like それ, meaning 'X or more'. For example, １００円以上 means '100 yen or more'. In contrast, 以上に follows nouns, verbs, or adjectives, and means 'more than (A)'. For example, 必要以上に means 'more than necessary'.

からある and 以上① both emphasize large numbers or amounts, but differ in nuance and usage. からある means 'as many as', usually with inanimate objects (due to the use of ある), and attaches directly to nouns, e.g. ５００枚からあるチケット ('as many as 500 tickets'). 以上① means 'X or more', can be used with people, and attaches to nouns with の, e.g. 500人以上の学生 = '500 or more students'.

Both 以上① and より express comparisons like 'more than (A)', but with different nuances. 以上 follows numbers or nouns like これ, and means '(A) or more,' e.g. ２時間以上かかる ('It will take two or more hours.'). より makes general comparisons and does not necessarily have a nuance of measuring some quantity.