The price of karaage varies at each shop, but 3 pieces (approx. 100g) are usually sold for about 300 JPY. The cost can be only 10 to 20% of this price. With this ratio, you can make a profitable business, since the percentage of cost to sales for Japanese restaurants is normally about 30%.
On top of that, take-out only restaurants need just a small space that helps cut rent costs. As for the initial investment in equipment, all they need is a fryer and refrigerator, which can be purchased for 3 million JPY (Approx. 30,000USD) if you select reasonable options. Karaage shops can also address the problem of short-handed restaurants in Japan: with a special fryer and manual, part-time workers with no experience in cooking can learn how to cook even on their first day.
Karaage is popular for its variety as well: soy sauce is a typical flavor, but you can also enjoy diverse kinds, such as salt, shio koji (fermented salt and rice koji), miso, curry, tartar sauce, mentaiko (spicy cod roe) mayonnaise, etc.
Since chicken is available anywhere in the world, some Japanese restaurants may switch to karaage take-out shops in the future.