The other day I went to Roshoki in Kobe to buy pork buns. I spent my childhood in Kobe and everyone living in Kobe has eaten these pork buns at least once. A common pork bun has a fluffy skin and sweet ingredients, but Roshoki’s pork bun has a springy skin and juicy meat strongly seasoned with soy-sauce , so it’s absolutely delicious. It’s bit-sized and I can’t stop eating a lot of them. Your sentence "I spent my childhood in Kobe" is perfectly correct, but we would probably say, "I grew up in Kobe."