noun
A retail store specializing in do-it-yourself supplies, tools, and materials for home improvement and crafts.
週末にＤＩＹ店で木材とペンキを買った。
I bought lumber and paint at the DIY store over the weekend.
近所のＤＩＹ店は工具の品揃えが豊富だ。
The local hardware store has a wide selection of tools.
ホームセンター is a more general term for a home improvement center, often larger and carrying a wider range of household goods, while ＤＩＹ店 specifically emphasizes do-it-yourself supplies and may be smaller.
From English 'DIY' (do-it-yourself) + 店 (store).