- How is お空 read, おそら or おぞら? [Answer] おそら is correct. おぞら is wrong. By the way, if you want to express 大空, you can read おおぞら. It means spacious skies. - Are both options ok? If so, is there a difference between them? [Answer] No, the reason is as mentioned above. - just 空 (without the お) is ok, isn't it? If I recall correctly, just 金 is a bit rude (mafia-like). [Answer] Yes, it is OK. お空 is more polite than 空. But this case, just 空 is not rude. When adults talk to kids, they tend to use お空. And when adults talk to other adults, they tend to use 空. However, お金 is used by everyone except for people who have a sharp tongue.(mafia-like) Hi, Aécio! I hope my answer will be helpful for you. Thank you for reading this to the end!