TSUKUMO eX. at Akihabara, Tokyo

Landmark black PC-parts tower on Chuo-dori with BTO gaming rigs.

TSUKUMO eX. is a landmark black PC-parts store on Chuo-dori in Sotokanda, packed with components across seven floors from basement level to the sixth. One of the largest PC-parts shops in the city, it is a favourite of self-builders chasing cases, graphics cards, motherboards, and storage. It stands a short walk from Akihabara Station.

The shop carries build-to-order PCs under its eX.computer and G-GEAR gaming brands, plus gaming devices, keyboards, mice, and a dedicated Razer Store on basement level stocking Razer Blade laptops and gaming chairs. Knowledgeable staff can help novices and veterans alike configure a custom rig. It suits PC builders, gamers, and anyone upgrading their setup.

Wander floor by floor to compare parts in person, and check the BTO counters if you fancy a rig built to spec. For self-builders, few places in Tokyo match this breadth.
Official: https://tenpo.tsukumo.co.jp/stores/view/ex