Chibo is a popular but a little expensive Okonomiyaki place in Dotonbori Street.
Okonomiyaki is a Japanese savoury pancake containing a variety of ingredients. The name is derived from the word okonomi, meaning “what you like” or “what you want”, and yaki meaning “grilled” or “cooked”. Okonomiyaki is mainly associated with Kansai or Hiroshima areas of Japan, but is widely available throughout the country. Toppings and batters tend to vary according to region. (Thanks Wikipedia)