Originally Posted by
gnaget
Usually you cannot buy laptop power adapters in a retail store. In Japan, I had to order it online from Rakuten when I needed a HP laptop power adapter (missing, not broken). Also you can buy a generic one for like 2000 yen vs. 12000 yen from the manufacturer. I checked the likes of Yodobashi and Bic and they don't carry this type of product.
Just be careful of them generic ones. Many of them drive their clock oscillator off the mains, so if it's the wrong frequency your laptop will run really slow. Not recommended.