For personal reasons, I'm not going to be specific. I'm just going to say many parts of Asia; just not Japan. It's not perfect and there are probably better measures, but this map gives you an idea: https://en.wikipedia.org/wiki/Corruption_Perceptions_Index
As lotsofpulp has already mentioned, your experience will be drastically different if you're just visiting and if you're not a native. I lived in Asia and I'm also native. My family is still there, and I visit from time to time. If you haven't conducted business or dealt with law enforcement, it's hard to have a full picture; especially if you're just passing by.
For personal reasons, I'm not going to be specific. I'm just going to say many parts of Asia; just not Japan. It's not perfect and there are probably better measures, but this map gives you an idea: https://en.wikipedia.org/wiki/Corruption_Perceptions_Index
As lotsofpulp has already mentioned, your experience will be drastically different if you're just visiting and if you're not a native. I lived in Asia and I'm also native. My family is still there, and I visit from time to time. If you haven't conducted business or dealt with law enforcement, it's hard to have a full picture; especially if you're just passing by.