ijou 以上 いじょう

Noun meaning: more than, over, mentioned above, (not) any longer, (no) more, once..., now that..., since, as long as

1. After noun expressing length/quantity/price
そこまで行くの一時間以上かかります。
Soko made iku no ni ichi jikan ijou kakarimasu.
It will take more than one hour to get there.
このトンネルは二キロメートル以上あります。
Kono tonneru wa ni kiromeetoru ijou arimasu.
This tunnel is more than two kilometers long.

2. Followed by no + noun
以上理由でこれは中止になりました。
Ijou no riyuu de kore wa chuushi ni narimashita.
This was cancelled for the reasons mentioned above.
十八歳以上しか入りません。
Juuhassai ijou no hito shika hairimasen.
Only people that are eighteen and over are allowed to enter.

3. After the demonstrative pronouns kore, sore, are
これ以上ここで待てません。
Kore ijou koko de matemasen.
I can't wait here any longer.
それ以上は無理です。
Sore ijou wa muri desu.
Any more than that is impossible.

4. After the end of a clause
それをやると決めた以上努力しなければなりません。
Sore o yaru to kimeta ijou doryoku shinakereba narimasen.
Now that you decided to do it, you must waork hard.
(kara niwa can replace ijou)
ここまでやった以上完成しよう。
Koko made yatta ijou kansei shiyou.
As long as we come this far, let's complete it.