PokillionaireSnkrdunk Akihabara: 4.5/5 Diamond. The ultimate PSA slab shop in Japan.
Tax Free with an enormous selection of graded cards. If you love PSA slabs, this is your playground. Most Japanese shops focus on raw singles; Snkrdunk fills the gap.
They even had some "damaged" but quite minty raw singles. Skip the Nagoya Parco branch; mall premium.