We found this small restaurant near Tenma Station in Osaka City but during that time it was way past lunch and still a few hours before they open for dinner so T and I decided to come back another time.
We finally found a good time one Sunday afternoon to try this small Thai Restaurant. Lunch set was 700 yen. No lunch buffet or anything. And during the times we were there ( 2 times already) nobody was smoking.
The restaurant is about 5 minutes walk from JR Tenma Station. There is a small Thailand flag outside and the restaurant is located on the ground floor.
Lunch Set including a small plate of salad , a bowl of soup and a small bowl of dessert and hot or cold coffee after the meal.
The second time we went there, I ordered the green curry lunch set. I did not like it much. Next time maybe I will try Ramen or Pad Thai.