I can certainly apply for DTV in other countries. However, the tax return documents I submitted to prove my income are written in Japanese. If I were to submit these documents in, say, Vietnam, would they be able to understand them? I was worried that they would not be able to understand the Japanese documents and would reject my application.
There have been instances at other Thai consulates where DTV visas were granted even to people with low incomes. I will try applying at a different consulate next time.
Real estate rental income is considered passive income. I also have earned income from employment, but since my passive income is greater, I wrote about that instead. That seems to have been a mistake.
She asked me how many days I would be staying if this visa was approved. I told her that I would be staying for about 60 days this time, but that I had applied for a DTV visa in order to stay for more than 180 days a year.