I usually purchase my computer components from Newegg. However, whenever I was impatient or pressed for time, I used to go to Fry’s. I remember one time in 2011 driving from Santa Cruz to Campbell to pick up a hard drive to replace one that suddenly failed; having to wait days for shipping would have been more inconvenient. Fry’s is a great convenience in these cases. It’s unfortunate to see Fry’s in the zombified st…
And not only Tokyo. Yodobashi has a couple of dozen stores throughout Japan, some of them, such as Yokohama and Umeda (Osaka), as big as the flagship in Akihabara. They're a good source for household appliances, too.
I live in Yokohama, and I shop at Yodobashi not for the prices but for the service: More than once a salesperson has saved me a lot of trouble by confirming that whatever I bought (a monitor, a hard drive, a cable) was actually compatible with the computer I was using. The staff know their products, and they are willing to give up sales in order to keep from selling people something they can't use. That makes me a more loyal customer.
Yodobashi seems to have a lot of Chinese-speaking staff these days, which is understandable considering the large number of Chinese tourists in Japan in recent years. Probably some of the staff speak English, too, though I've never asked.