How do you say start in Japanese?

Answer 1

The verb "to open" is 'aku' (intransitive) and 'akeru' (transitive). The state of something (i.e., a door, or the availability of a seat) being open is 'aite iru.'

In the context of business, a store that is "open" is 'eigyouchuu.'

Answer 2

If you mean the noun it is: "kaishi" 開始

If you mean like the command : "Start!" I think it is: "dashite" 出して 　

Answer 3

You may say 'akete kudasai,' written: 明けてください

Answer 4

あける。(a-ke-lu).

Answer 5

Doawo shimete kudasai