Tokyo isn't as expensive as it was, because the Yen has fallen by about 30% in the past two or three years. So now, prices are more or less comparable to Europe or the U.S.
So if Tokyo is where you really want to go, I think you should.
I can suggest you to visit Sentosa Island which is in Singapore itself.
It is just 500 meters off the coast of Singapore..It has Universal Studios to the historical forts, or the Dolphin Lagoon and many more for all age group people..
Also you can visit Singapore city which will take almost 5 days to explore tourist attractions.
Plan your trip according to the 2 day sentosa tour itinerary link given below by editing it as you think.
Tokyo is not expensive at all. It's about the same as average priced EU countries or even cheaper.
i never visit these place so i can't say anything about them but i think India is best for you which is not so expensive and also great to visit. every year millions of people visit here and enjoy so much they spent their memorable moments here and love to come again here so you must visit India.
i think Turkey and Cyprus and middle east countries are the best destinations in Summer,,u will enjoy ur vacation..read more about them in the link below
I think malaysia is a good country to visit
You are welcome to Nepal becuase mountains are calling, the beautiful nature is calling, the culture and spiritual traditions are amazing.